FOR PUBLICATION
  UNITED STATES COURT OF APPEALS
       FOR THE NINTH CIRCUIT

COOS COUNTY BOARD OF COUNTY                 
COMMISSIONERS,
                  Plaintiff-Appellant,
                  v.
                                                  No. 06-35634
DIRK KEMPTHORNE,* in his official
capacity as Secretary of the                       D.C. No.
                                                CV-06-06010-MRH
Interior; UNITED STATES FISH &
WILDLIFE SERVICE; H. DALE HALL,                     OPINION
in his official capacity as Director,
United States Fish and Wildlife
Services,
               Defendants-Appellees.
                                            
         Appeal from the United States District Court
                  for the District of Oregon
         Michael R. Hogan, District Judge, Presiding

                    Argued and Submitted
               March 5, 2008—Portland, Oregon

                        Filed June 26, 2008

   Before: Ferdinand F. Fernandez and Marsha S. Berzon,
   Circuit Judges, and Otis D. Wright II,** District Judge.

                     Opinion by Judge Berzon

  *Dirk Kempthorne is substituted for his predecessor, Gale A. Norton,
as Secretary of the Interior. Fed. R. App. P. 43(c)(2).
  **The Honorable Otis D. Wright II, United States District Judge for the
Central District of California, sitting by designation.

                                 7469
                COOS COUNTY v. KEMPTHORNE            7471


                       COUNSEL

Ralph Kasarda (argued), J. David Breemer, M. Reed Hopper,
and Scott Andrew Shepard, of the Pacific Legal Foundation,
7472                COOS COUNTY v. KEMPTHORNE
for plaintiff-appellant Coos County Board of County Com-
missioners.

Ellen J. Durkee (argued), Courtney Taylor, and Lisa Jones,
Environment & Natural Resources Division, U.S. Department
of Justice, Sue Ellen Wooldridge, Assistant Attorney General,
and Benjamin C. Jessup and Eric Nagle, Office of the Solici-
tor, U.S. Department of the Interior, for defendants-appellees
Dirk Kempthorne, Secretary of the Interior, United States Fish
and Wildlife Service, and H. Dale Hall, Director, United
States Fish and Wildlife Service.


                              OPINION

BERZON, Circuit Judge:

   We are asked to decide whether the Fish and Wildlife Ser-
vice (“FWS”)1 has an enforceable duty promptly to withdraw
a threatened species from the protections of the Endangered
Species Act (the “ESA” or the “Act”), 16 U.S.C. §§ 1531-
1544, after a five-year agency review mandated by the Act
found that the species does not fit into one of the several types
of population categories protected under the ESA. We answer
that FWS does not have such a duty.

                       I.   BACKGROUND

   The Coos County Board of County Commissioners (“Coos
County”) brought this action under the ESA’s citizen suit pro-
vision, 16 U.S.C. § 1540(g), and under the Administrative
Procedure Act (“APA”), 5 U.S.C. §§ 551-559. The suit rests
on the results of a FWS species status review of the marbled
murrelet, a rare seabird that nests in mature and old-growth
forests. See generally U.S. Fish & Wildlife Service, Marbled
  1
   The Secretary of the Interior and the Director of FWS are also defen-
dants in this case. We refer to all of the defendants collectively as FWS.
                  COOS COUNTY v. KEMPTHORNE                 7473
Murrelet 5-Year Review (“Five Year Review”). The murrelets
living in Washington, Oregon, and California — which we
will refer to as the tri-state murrelets — are the protected pop-
ulation. The tri-state murrelets — and only the tri-state murre-
lets — were listed under the ESA as a “threatened species,”
after the detailed consideration required by the statute. See
Determination of Threatened Status for the Washington, Ore-
gon, and California Population of the Marbled Murrelet, 57
Fed. Reg. 45,328, 45,328-29 (Oct. 1, 1992) (“Listing Rule”).

   FWS is required to “conduct, at least once every five years,
a review of all species” protected under the ESA and to “de-
termine on the basis of such review whether” the listing status
of protected species should be changed. 16 U.S.C.
§ 1533(c)(2). The five-year review of the tri-state murrelet
listing, released in 2004, concluded that the tri-state murrelets
do not meet the definition of a “distinct population segment,”
one of the population categories which may be protected
under the ESA, see 16 U.S.C. § 1532(16), but determined that
they nonetheless remained threatened. Five-Year Review at 6,
28. FWS also noted that a district court had held that the tri-
state murrelets could be protected even if they did not consti-
tute a distinct population segment, because they occupied a
significant portion of the range of the entire species. 

FWS therefore determined not to alter the protections
afforded the species pending a more complete review. 

   Coos County maintains that this cautious approach to spe-
cies protection is illegal, and that, instead, FWS had a manda-
tory duty promptly to remove the tri-state murrelets from the
ESA’s threatened species list, “delisting” the birds, as a result
of the Five-Year Review. Seizing on a statutory deadline for
“promptly publish[ing]” proposed regulations in response to
a citizen petition so warranting, Coos County argues that
FWS had such a duty here and must follow the same deadline,
even though no petition has been filed. To explain why Coos
County is mistaken, and why the dismissal of its suit was
7474                 COOS COUNTY v. KEMPTHORNE
appropriate, we first set out the biological and legal history of
the tri-state murrelet listing and of the subsequent litigation.

                    A.    The Marbled Murrelet

   In 1988, the National Audubon Society petitioned FWS to
list the California, Oregon, and Washington population of the
marbled murrelet as a threatened species. See Proposed
Threatened Status for the Marbled Murrelet in Washington,
Oregon and California, 56 Fed. Reg. 28,362, 28,364 (June 20,
1991) (“Proposed Rule”).2 A “threatened” species is one
which “is likely to become an endangered species within the
foreseeable future throughout all or a significant portion of its
range.” 16 U.S.C. § 1532(20). The Audubon Society alleged
that the marbled murrelet population in the three states was
dangerously depleted.

   Murrelets — small, dove-sized birds — feed primarily on
sea life and nest in coastal mature and old-growth forests. See
Listing Rule, 57 Fed. Reg. at 45,328-29. “[T]he main cause
of population decline has been the loss of older forest and
associated nest sites,” in large part because of timber harvest-
ing. 

At the time the tri-state murrelets were
listed for ESA protection, over 80% of their habitat had been
lost in Washington and Oregon and as much as 96% had been
lost in California. 

Murrelet nests in the remain-
ing fragments of old growth forest are more accessible to
predators than they were before the forests were lost, further
threatening the species. 

Also, when murrelets
leave the forest to feed at sea, they are threatened by gill-net
fishing boats and by oil spills. 

Because murre-
lets do not reproduce every year and generally lay only one
egg when they do, the species recovers slowly from popula-
tion losses. 

  2
    Technically, the Secretary of the Interior has authority over the tri-state
murrelets, see 16 U.S.C. § 1532(15), but that authority has been delegated
to FWS, see 50 C.F.R. § 402.01(b). Thus, references to the Secretary in
this opinion refer interchangeably to FWS, unless otherwise noted.
                  COOS COUNTY v. KEMPTHORNE                 7475
   As a result of these various forces, murrelet populations
crashed. Historically, as many as 60,000 murrelets may have
lived in California alone. 

By 1992, when the tri-
state murrelets were listed as threatened, FWS believed that
only 9,000 birds all together then remained in all three states.

Some years after listing, FWS estimated the
annual rate of population decline in the three states as
between four and six percent. See Final Designation of Criti-
cal Habitat for the Marbled Murrelet, 61 Fed. Reg. 26,256,
26,259 (May 24, 1996) (“Critical Habitat Rule”). These popu-
lation losses are important, as the three states comprise
roughly one-third of the murrelet’s range, which extends
north to Alaska. See Proposed Rule, 56 Fed. Reg. at 28,364,
28,366. The Proposed Rule concluded that “California, Ore-
gon, and Washington constitute a significant portion of the
marbled murrelet’s range.” 

     B.   Legal Protections for the Marbled Murrelet

  FWS moved slowly in considering the Audubon Society’s
petition to list the tri-state murrelets. Eventually, the Audubon
Society sued, contending that FWS had missed mandatory
ESA deadlines triggered by a listing petition. See Marbled
Murrelet v. Lujan, No. C91-522R, 4-7 (D. Wash. Sept. 17,
1992).

   At issue in that case was whether there was a “substantial
disagreement,” see 16 U.S.C. § 1533(b)(6)(B)(i), concerning
whether the tri-state population of the marbled murrelet was
a “distinct population segment” of the larger species. The
ESA defines species to “include[ ] . . . any distinct population
segment of any species of vertebrate fish or wildlife which
interbreeds when mature.” 16 U.S.C. § 1532(16) (emphasis
added). FWS maintained that the tri-state murrelets could be
listed only as a distinct population segment, and that there
was a substantial scientific disagreement as to that question,
justifying a six-month delay. Notice of Extension of the Final
Decision to List the Washington, Oregon, and California Pop-
7476              COOS COUNTY v. KEMPTHORNE
ulation of the Marbled Murrelet as a Threatened Species, 57
Fed. Reg. 33,478, 33,479 (July 29, 1992) (“Extension
Notice”); see 16 U.S.C. § 1533(b)(6)(B)(i) (providing for
such a delay for the purpose of “soliciting additional data”).

   The district court in Marbled Murrelet disagreed with both
FWS’s premises and its conclusion. It first held that FWS
could list the tri-state population whether or not that popula-
tion was a distinct population segment, rendering any substan-
tial disagreement as to that question irrelevant. Marbled
Murrelet, No. C91-522R at 11-12. The court observed that a
threatened species is one which “is likely to become an
endangered species within the foreseeable future throughout
all or a significant portion of its range.” 

(quoting 16
U.S.C. § 1532(20), emphasis added). In light of this defini-
tion, the court reasoned as follows:

       Plaintiffs argue that, in order to support listing the
    marbled murrelet as threatened under the ESA, the
    Secretary [of the Interior] need only find that the
    North American subspecies of the marbled murrelet
    is threatened throughout a significant portion of its
    range. Plaintiffs then point out that the Secretary
    reached those very conclusions in his [Proposed
    Rule] and that he has never retreated from or
    retracted them.

       Indeed, the [Proposed Rule] cites the definition of
    a “threatened species” quoted above and then states
    that “California, Oregon, and Washington constitute
    a significant portion of the marbled murrelet’s range.
    In those states the species is immediately threatened
    by the loss of nesting habitat (old-growth and mature
    forests).” [Citation omitted] Nothing in the [Exten-
    sion Notice] contradicts or casts any doubt on these
    conclusions. Therefore, the court concludes that,
    based on the uncontradicted findings that the mar-
    bled murrelet qualifies for listing as a threatened spe-
                     COOS COUNTY v. KEMPTHORNE                         7477
      cies throughout a significant portion of its range
      within the meaning of the ESA, there is no need to
      consider the alternative basis of whether the tri-state
      population is a distinct population segment which
      might qualify for protection under the ESA.

Marbled Murrelet, No. C91-522R at 11-12.3 The court further
held that, in any event, there was no substantial disagreement
as to the distinct population segment question, so no delay
was justified even if the distinct population segment issue
mattered. 

It ordered FWS promptly to make its
final listing decision. 

FWS complied with the
district court’s order a few days later, and did not appeal it.

   In its final listing rule, FWS discussed in an interwoven
fashion whether the tri-state murrelets are a distinct popula-
tion segment and whether they inhabit a significant portion of
the species’s range. The rule provides, in a section entitled
“Distinct Population Segment”:

      [E]xisting legal mechanisms are not adequate to pro-
      tect the marbled murrelet in California, Oregon, and
      Washington. The three states encompass roughly
      one-third of the geographic area occupied by this
      subspecies, comprising a significant portion of its
      range. The amount of nesting habitat has undergone
  3
    The district court referred to the North American marbled murrelet as
a “subspecies” because, at the time of listing, that population was thought
to be within the same species as an Asian murrelet species. See Listing
Rule, 57 Fed. Reg. at 45,328. After reviewing more recent studies, FWS
concluded that the North American murrelet is a distinct species. See Des-
ignation of Critical Habitat for the Marbled Murrelet; Proposed Rule, 71
Fed. Reg. 53,838, 53,840 (Sept. 12, 2006). The distinction is not of any
relevance to the ESA’s protections, as the statute specifies that “[t]he term
‘species’ includes any subspecies of fish or wildlife,” 16 U.S.C.
§ 1532(16), and FWS has construed the statute to allow it to protect dis-
tinct population segments of subspecies. See Policy Regarding the Recog-
nition of Distinct Vertebrate Population Segments Under the Endangered
Species Act, 61 Fed. Reg. 4,722, 4,724 (Feb. 7, 1996).
7478              COOS COUNTY v. KEMPTHORNE
    a tremendous decline since the late 1800s (most of
    which has taken place during the last 20 to 30 years),
    especially in the coastal areas of all three states.

       At the time of proposing to list the marbled murre-
    let in Washington, Oregon, and California, the Ser-
    vice considered the murrelets in these States to
    constitute a distinct population segment comprising
    a significant portion of the eastern Pacific subspecies
    of the marbled murrelet. While the Service continues
    to believe that existing legal protection is not ade-
    quate to ensure survival of murrelets in the three-
    state area, some question remains whether the popu-
    lation listed in this rule qualifies for protection under
    the [ESA’s] definition of “species.”

       Compliance with a court order required a final
    decision on listing to be made at this time. Based on
    the information now available to the Service, the
    only supportable decision that can be reached within
    the limit imposed by the court is to list the popula-
    tion as proposed. Nevertheless, the Service intends
    to reexamine the basis of recognizing this population
    of murrelets as a “species” under the Act. Within 90
    days, the Service will announce the results of this
    examination and at that time may propose a regula-
    tory change that would alter the listing of the murre-
    let as a threatened species.

Listing Rule, 57 Fed. Reg. at 45,330.

   Despite its equivocation in the Listing Rule, FWS never
proposed altering the listing. In 1996, FWS designated critical
habitat for the murrelets, see 16 U.S.C. § 1533(a)(3), observ-
ing that the “loss of nesting habitat [is] one of the primary fac-
tors limiting current population size from British Columbia to
California.” Critical Habitat Rule, 61 Fed. Reg. at 26,258.
                   COOS COUNTY v. KEMPTHORNE                   7479
   In 1997, FWS adopted a Recovery Plan for the murrelets.
See U.S. Fish & Wildlife Service, Recovery Plan for the Mar-
bled Murrelet (“Recovery Plan”);4 see also 16 U.S.C.
§ 1533(f). Recovery plans set out, among other goals, “objec-
tive, measurable criteria which, when met, would result in a
determination . . . that [a] species be removed from the list.”
16 U.S.C. § 1533(f)(B)(ii). The Recovery Plan did not
develop final specific delisting criteria, pending further
research, but did provide “[i]nterim delisting criteria,” which
include:

      1) Trends in estimated population size, densities and
      productivity have been stable or increasing in four of
      the six zones [into which the region occupied by the
      tri-state murrelets has been divided] over a 10-year
      period. This period of time will encompass at least
      one to two El Niño events, based on recent fre-
      quency of occurrences.

      2) Management commitments (marine and terres-
      trial) and monitoring have been implemented that
      provide adequate protection of marbled murrelets in
      the six Conservation Zones for at least the near
      future (50 years).

Recovery Plan at 112-13; see also Five-Year Review at 17.

   Since 1992, when the tri-state murrelets were listed, their
population appears to have somewhat increased, although
improvements in data collection in the interim makes absolute
population comparisons difficult. See 

The 2004
Five-Year Review estimated that as many as 24,400 birds
may now be present in the three states. 

Nonetheless,
the Five-Year Review also found that the murrelet continues
to face serious threats and, while there is not adequate infor-
  4
   The Recovery Plan is available online at http://ecos.fws.gov/docs/
recovery_plans/1997/970924.pdf.
7480                 COOS COUNTY v. KEMPTHORNE
mation presently to determine a population trend, many
experts suspect the population is now declining. 

18-
20. The population north of the border also appears to be in
trouble, as Canada recently listed the marbled murrelet as a
threatened species under its Species at Risk Act (“SARA”),
S.C. ch. 29, enacted in 2002. See Five-Year Review at 14-16.

   C.    The Distinct Population Segment Policy and the
                      Five-Year Review

   After the tri-state murrelets were listed as threatened, and
before the Five-Year Review, FWS promulgated a policy
defining characteristics of “distinct population segments” for
purposes of the ESA. See Policy Regarding the Recognition
of Distinct Vertebrate Population Segments Under the Endan-
gered Species Act, 61 Fed. Reg. 4,722, 4,724 (Feb. 7, 1996)
(“DPS Policy”); see also 16 U.S.C. § 1532(16). We recently
determined that the DPS Policy is “based on a reasonable con-
struction” of the ESA. Nw. Ecosystem Alliance v. U.S. Fish &
Wildlife Serv., 

, 1143-45 (9th Cir. 2007).

   In the DPS Policy, FWS set out a two-step process for
determining whether a population qualifies as a “distinct pop-
ulation segment.” DPS Policy, 61 Fed. Reg. at 4,725; see also
Nw. Ecosystem 

(describing the
DPS Policy). FWS first asks if the population is “discrete”
with regard to “the remainder of the species to which it
belongs,” and, if the population is discrete, then inquires into
the “significance” of the population to the species as a whole.

Policy does not equate the “significant portion
of the range” and “distinct population segment” issues,
although range considerations are incorporated into the signif-
icance aspect of the inquiry. Id.5
  5
    A population may, for instance, be significant if its loss “would result
in a significant gap in the range of a taxon,” or if it is “the only surviving
natural occurrence of a taxon” outside of its historic range. DPS Policy,
61 Fed. Reg. at 4,725.
                    COOS COUNTY v. KEMPTHORNE                       7481
   Of particular relevance here, under the DPS Policy a spe-
cies may be discrete even if it is not separated from other
members of its species by physical or ecological barriers, if
“[i]t is delimited by international governmental boundaries
within which differences in control of exploitation, manage-
ment of habitat, conservation status, or regulatory mecha-
nisms exist that are significant in light of [16 U.S.C.
§ 1533(a)(1)(D), which addresses “the inadequacy of existing
regulatory mechanisms” to protect a species].” DPS Policy,
61 Fed. Reg. at 4,725. FWS “recognize[d] that the use of
international boundaries as a measure of discreteness may
introduce an artificial and non-biological element to the rec-
ognition” of distinct population segments, but maintained that
“national legislation, which has its principal effects on a
national scale, [could properly] recognize units delimited by
international boundaries.” 

   FWS understood that earlier distinct population segment
determinations might not satisfy the DPS Policy, and so
announced that “[a]ny [distinct population segment] of a ver-
tebrate taxon that was listed prior to implementation of this
policy will be reevaluated on a case-by-case basis as recom-
mendations are made to change the listing status for that dis-
tinct population segment.” 

The policy is also to
“be considered in the 5-year reviews of the status of listed
species required by [16 U.S.C. § 1533(c)(2)].” 

murrelet distinct population segment determination was thus
subject to consideration under the new DPS Policy when it
came up for a five-year review.

  The ESA provides for such reviews in 16 U.S.C. § 1533(c),
which is entitled “Lists” and addresses generally FWS’s obli-

  Taxonomy is “the science dealing with the description, identification,
naming, and classification of organisms;” a taxon is a taxonomic category,
such as a genus or species. THE RANDOM HOUSE DICTIONARY OF THE
ENGLISH LANGUAGE 1947 (2nd ed. 1987).
7482             COOS COUNTY v. KEMPTHORNE
gation to maintain and update the endangered and threatened
species lists. The five-year review provision, 16 U.S.C.
§ 1533(c)(2), states:

    The Secretary shall —

    (A) conduct, at least once every five years, a review
    of all species included [in the endangered and threat-
    ened species lists provided for in 16 U.S.C.
    § 1533(c)(1)]; and

    (B) determine on the basis of such review whether
    any such species should —

         (i) be removed from such list;

         (ii) be changed in status from an endan-
         gered species to a threatened species; or

         (iii) be changed in status from a threatened
         species to an endangered species.

    Each determination under subparagraph (B) shall be
    made in accordance with the provisions of subsec-
    tions (a) and (b) of [16 U.S.C. § 1533].

   The murrelet review was delayed for several years. In
2002, a timber industry group, the American Forest Resource
Council, along with several lumber companies, filed suit argu-
ing that FWS had failed to comply with a mandatory duty,
imposed by 16 U.S.C. § 1533(c)(2), to review the tri-state
murrelet listing. The suit settled, with FWS agreeing to com-
plete the review. See Settlement Agreement and Stipulation of
Dismissal with Prejudice, Am. Forest Res. Council v. Sec’y of
the Interior, Civ. No. 02-06087-AA (D. Or., Jan. 2003). As a
result, FWS published an announcement in the Federal Regis-
ter, as it is required to do when it initiates a review. See 5-
Year Review of the Marbled Murrelet and the Northern Spot-
                  COOS COUNTY v. KEMPTHORNE                  7483
ted Owl, 68 Fed. Reg. 19,569 (Apr. 21, 2003) (“Review
Notice”); see also 50 C.F.R. § 424.21 (requiring a published
review announcement). In the Review Notice, FWS explained
that the review would assess:

    (a) Whether new information suggests that the spe-
    cies’ population is increasing, declining, or stable;
    (b) whether existing threats are increasing, the same,
    reduced, or eliminated; (c) if there are any new
    threats; and (d) if new information or analysis calls
    into question any of the conclusions in the original
    listing determination as to the species’ status. The
    review will also apply this new information to con-
    sideration of the appropriate application of the [DPS
    Policy] to the listed entity, if applicable.

68 Fed. Reg. at 19,570. The notice invited the public to sub-
mit relevant information. 

19,571. FWS
explained that “[i]f the present classification of [the murrelet]
is not consistent with the best scientific and commercial infor-
mation available, we may, at the conclusion of this review,
initiate a separate action to propose changes to the List
accordingly.” 

Review was conducted by “over a dozen
biologists,” along with “an international environmental con-
sulting company.” Five-Year Review at 1. Once these experts
had gathered relevant information, FWS managers convened
to answer three questions:

    1) Does the currently listed distinct population seg-
    ment meet the criteria established in the Service’s
    [DPS Policy]?

    2) Is there new information about the threats or pop-
    ulation status of [sic] the murrelet?

    3) If so, does the new information suggest that a
    change in listing status is warranted?
7484              COOS COUNTY v. KEMPTHORNE

   In accord with this outline, the Five-Year Review first ana-
lyzed whether the tri-state murrelets qualified as a distinct
population segment under the DPS Policy. 

14-17.
FWS found that, as of 2002 when Canada protected its murre-
let population under SARA, there were no significant differ-
ences at the American/Canadian border in legal protections
for the species. 

As the American and Canadian
murrelet populations are not otherwise separate, FWS found
that they did not meet the DPS Policy’s discreteness criterion,
and so could not properly be termed a distinct population seg-
ment. 

14-17. FWS noted, however, that the district
court in Marbled Murrelet “found that, as the murrelet quali-
fies for listing as a threatened species throughout a significant
portion of its range, ‘there is no need to consider the alterna-
tive basis of whether the tri-state population is a distinct popu-
lation segment.’ ” 

(quoting Marbled Murrelet, No.
C91-522R at 12).

   The Review went on to find that the tri-state murrelets are
still threatened and that none of the interim delisting criteria
from the Recovery Plan have been met. Five-Year Review at
17-18. Further, the new information FWS collected

     supports the conclusion that the past harvest of old-
     growth forests in the Washington, Oregon, and Cali-
     fornia range of the murrelet has significantly contrib-
     uted to a commensurate decline in the number of
     murrelets [from historic numbers]. There is no com-
     pelling information indicating this situation has
     improved through the production of significant new
     suitable nesting habitat since listing.

Five-Year Review at 18-19 (internal citation omitted).

   Accordingly, the Review concluded, a change in ESA clas-
sification was not warranted because “[t]he threat situation
                     COOS COUNTY v. KEMPTHORNE                        7485
has not changed such that the murrelet DPS [(distinct popula-
tion segment)] is no longer likely to become an endangered
species within the foreseeable future throughout all or a sig-
nificant portion of its range.”6 Five-Year Review at 21. FWS
did opt to “complet[e] . . . a range-wide status review,”after
which it might take further action regarding the tri-state mur-
relet listing. Five-Year Review at 28. Pending completion of
that larger review, “[t]here will be no change in the species
status.” 

Litigation

   With the Five-Year Review in hand, Coos County wrote
FWS and advised of its intent to sue to force the delisting of
the tri-state murrelets. See 16 U.S.C. § 1540(g)(2) (providing
notice requirements for ESA citizen suits). Coos County con-
tended that the Five-Year Review’s determination that the tri-
state population did not fulfill the DPS Policy meant that
FWS had a duty promptly to publish a proposed rule delisting
the murrelets, and, moreover, to publish a final rule imple-
menting the delisting within a year of the proposed rule.
Overlooking the Review’s conclusion that the tri-state murre-
lets had not met the recovery criteria and remained threatened
as well as the Review’s reference to the Marbled Murrelet
court’s “significant portion of the range” holding, Coos
County charged that FWS’s determination to continue pro-
tecting the murrelets, at least pending the completion of a ful-
ler review, had been made “[w]ithout explanation or claim of
authority.”

   When FWS did not comply with Coos County’s requests,
  6
    The Review referred to the tri-state murrelet population as a distinct
population segment, even though it also explained that the population did
not meet the DPS Policy. It seems apparent that FWS was referring to the
tri-state murrelets as a group, not to their technical status. At oral argu-
ment, government counsel so indicated, suggesting that the use of “DPS”
as shorthand for the tri-state murrelets was due to sloppy editing.
7486              COOS COUNTY v. KEMPTHORNE
Coos County filed suit. In its first cause of action, it argued
that FWS had violated the ESA; in the second, it charged
FWS had violated the APA. The ESA provisions which Coos
County argued were violated are:

    •   16 U.S.C. § 1533(c)(2), which requires FWS to
        conduct a five-year review and to make a deter-
        mination based upon it;

    •   16 U.S.C. § 1533(b)(3)(B)(ii), which requires
        FWS to “promptly publish” a proposed rule
        within twelve months after receiving a petition to
        alter a species’s listing status, if it concludes that
        “[t]he petitioned action is warranted”;

    •   16 U.S.C. § 1533(b)(5)(A), which provides that,
        once FWS decides to issue a regulation imple-
        menting a determination, the proposed regulation
        must be published not less than 90 days before
        the effective date of the regulation;

    •   16 U.S.C. § 1533(b)(6)(A), which provides that
        after publication of a proposed regulation, FWS
        generally must decide whether to finalize the reg-
        ulation within one year.

   In its second cause of action, Coos County alleged that
FWS’s failure to publish either a proposed or a final rule del-
isting the murrelets was, under the APA, “agency action
unlawfully withheld or unreasonably delayed.” 5 U.S.C.
§ 706(1).

   FWS filed a motion to dismiss under Federal Rules of Civil
Procedure 12(b)(1) (lack of subject-matter jurisdiction) and
12(b)(6) (failure to state a claim upon which relief can be
granted). The district court granted the motion, holding that it
lacked jurisdiction and, in the alternative, that Coos County
had failed to state a claim upon which relief could be granted.
                  COOS COUNTY v. KEMPTHORNE                  7487
   The court reasoned as follows: FWS had made the determi-
nation required by 16 U.S.C. § 1533(c)(2), but that determina-
tion did not implicate the requirement to “promptly publish”
a proposed rule triggered by 16 U.S.C. § 1533(b)(3)(B)(ii).
That provision, on its face, applies only when FWS has deter-
mined that a petitioned action is warranted. As Coos County
had not filed a petition, FWS had no duty under either the
ESA or the APA promptly to publish a proposed regulation
and, so, no duty to publish a final regulation. And, because
the citizen suit provisions of those statutes act to waive fed-
eral sovereign immunity, and Coos County had not stated a
claim under those provisions, immunity was not waived. The
district court therefore held that it lacked jurisdiction and dis-
missed the case without prejudice.

  Coos County filed this timely appeal. We essentially agree
with the district court and so affirm.

                       II.   ANALYSIS

                  A.   Analytic Framework

   Before us, as before the district court, Coos County’s argu-
ment proceeds as follows: (1) once FWS determined in the
Five-Year Review that the tri-state murrelets were not a dis-
tinct population segment, the agency should have concluded
that the species could not be protected under the ESA; (2) the
five-year review process is governed by the deadlines nor-
mally associated with citizen petitions, including the
“promptly publish” obligation of 16 U.S.C. § 1533(b)(3)
(B)(ii); and (3) FWS’s determination in the Five-Year Review
that the tri-state murrelets were not a distinct population seg-
ment thus triggered a judicially-enforceable duty promptly to
publish a proposed rule delisting the murrelets and then,
within a year, a final rule doing so. Coos County so argues
even though FWS’s ultimate determination in the Five-Year
Review was that delisting is not warranted.
7488                COOS COUNTY v. KEMPTHORNE
   Coos County’s suit, then, is premised on FWS’s failure to
act upon what Coos County maintains is a statutory duty aris-
ing from the distinct population segment determination made
in the Five-Year Review. This “failure to act” suit proceeds
principally under 16 U.S.C. § 1540(g)(1), the ESA’s citizen
suit provision. Coos County secondarily relies on an APA
provision, 5 U.S.C. § 706(1).

   The ESA’s citizen suit provision allows for suits in three
contexts. Coos County’s complaint did not explicitly state
which provision it is suing under, but, as it charges that FWS
has failed to act, we presume it brings suit under 16 U.S.C.
§ 1540(g)(1)(C), which allows suits “against the Secretary
where there is alleged a failure of the Secretary to perform
any act or duty under [16 U.S.C. § 1533] which is not discre-
tionary with the Secretary.”7

   The APA provides that “[a] person suffering legal wrong
because of agency action, or adversely affected or aggrieved
by agency action within the meaning of a relevant statute, is
entitled to judicial review thereof.” 5 U.S.C. § 702. “Agency
action” is defined to include an agency’s “failure to act.” 5
U.S.C. § 551(13). Coos County’s complaint specifically con-
tends that, under 5 U.S.C. § 706(1), FWS’s failure to delist
the tri-state murrelets is “agency action unlawfully withheld
or unreasonably delayed.” Review under that provision is lim-
ited to “discrete . . . action[s] that [an agency] is required to
take.” Norton v. S. Utah Wilderness Alliance (“SUWA”), 

, 64 (2004) (emphases omitted).
  7
   The other two ESA citizen suit provisions are inapposite. The first, 16
U.S.C. § 1540(g)(1)(A), “is a means by which private parties may enforce
the substantive provisions of the ESA against regulated parties — both
private entities and Government agencies — but is not an alternative ave-
nue for judicial review of the Secretary’s implementation of the statute.”
Bennett v. Spear, 

, 173 (1997). The second, 16 U.S.C.
§ 1540(g)(1)(B), concerns suits to “compel” the Secretary to take various
species-protective actions, not at issue here.
                 COOS COUNTY v. KEMPTHORNE                 7489
   The scope of 5 U.S.C. § 706(1) tracks that of 16 U.S.C.
§ 1540(g)(1)(C) for the purposes of this appeal, as the appli-
cability of both provisions depends upon whether FWS has
failed to act on a nondiscretionary duty to publish proposed
regulations delisting the murrelets (and final regulations
thereafter). Importantly, to the extent that the two causes of
action are identical, the APA provision is not applicable,
because “[i]f a plaintiff can bring suit against the responsible
federal agencies under [a citizen suit provision], this action
precludes an additional suit under the APA.” Brem-Air Dis-
posal v. Cohen, 

, 1005 (9th Cir. 1998) (quota-
tion marks omitted). We consider the impact of Brem-Air later
in this opinion.

   Because “[t]he United States must waive its sovereign
immunity before a federal court may adjudicate a claim
brought against a federal agency,” and has done so through
the above-discussed ESA and APA provisions, to “establish
waiver of immunity” Coos County must have successfully
stated a claim under those provisions. See Rattlesnake Coal.
v. U. S. Envtl. Prot. Agency, 

, 1103 (9th Cir.
2007); see also U.S. Dep’t of Energy v. Ohio, 

,
615 (1992); Gallo Cattle Co. v. U.S. Dep’t of Agric., 

, 1198 (9th Cir. 1998). Thus, if the district court’s Rule
12(b)(6) dismissal was justified, its Rule 12(b)(1) ruling was
also correct.

   In sum, leaving aside for the moment the question whether
5 U.S.C. § 706(1) is available to Coos County on its present
complaint, its 16 U.S.C. § 1540(g)(1)(C) and 5 U.S.C.
§ 706(1) causes of action may proceed only if FWS has a non-
discretionary duty to begin the delisting process — promptly
or otherwise — as a result of the determination made in the
Five-Year Review and has failed to act upon that duty.

   We begin our analysis, therefore, by examining the rela-
tionship between the five-year review provision, 16 U.S.C.
§ 1533(c)(2) and the remainder of 16 U.S.C. § 1533. We then
7490                  COOS COUNTY v. KEMPTHORNE
consider whether, given the determination FWS made in the
Five-Year Review, it failed to act upon any duties imposed by
16 U.S.C. § 1533(c)(2). Our “failure to act” inquiry necessar-
ily depends upon the determination FWS made; it does not go
behind the determination to inquire whether it should have
been made differently.8

 B.    The Five-Year Review Provision and the Statutory
                         Context

   In Coos County’s view, the last sentence of 16 U.S.C.
§ 1533(c)(2), which provides that “[e]ach [five-year review]
determination . . . shall be made in accordance with the provi-
sions of subsections (a) and (b) of [16 U.S.C. § 1533],” incor-
porates several statutory deadlines in 16 U.S.C. § 1533(b),
ordinarily triggered only by the filing of a citizen petition or
by FWS’s independent decision to publish a proposed rule
based upon one of its determinations. See 16 U.S.C.
§§ 1533(b)(3)(B)(ii), (b)(5)(A), (b)(6)(A). The latter two pro-
visions, 16 U.S.C. §§ 1533(b)(5)(A) and (b)(6)(A) do not con-
tain deadlines governing the period of time between a
determination and the publication of a proposed rule, but
instead govern the publication process for proposed and final
rules.9 Coos County therefore primarily grounds its contention
that FWS has failed to act upon a nondiscretionary duty aris-
ing from the five-year review determinations on 16 U.S.C.
  8
     Coos County argues that its complaint also alleges a violation of a dif-
ferent APA provision, 5 U.S.C. § 706(2)(C), although the complaint
nowhere cites that provision and specifically cites 5 U.S.C. § 706(1)
instead. Were we to review the Five-Year Review determination under
§ 706(2)(C), we would inquire whether it is “in excess of statutory juris-
diction, authority, or limitations, or short of statutory right,” and “hold [it]
unlawful and set [it] aside” if it is. After addressing the “failure to act”
causes of action actually alleged in the complaint we address Coos Coun-
ty’s 5 U.S.C. § 706(2)(C) argument, concluding that it is not properly
before us. See infra note 16.
   9
     16 U.S.C. § 1533(b)(5)(A)(i) does, however, require that a proposed
regulation be published “not less than 90 days” before its effective date.
                  COOS COUNTY v. KEMPTHORNE                  7491
§ 1533(b)(3)(B)(ii). That provision, again, imposes a duty on
FWS to “promptly publish” a proposed regulation when it
determines that an action that it has been petitioned to take is
warranted. On its face, the provision applies only when FWS
has been petitioned to act. Coos County nonetheless maintains
that “the five-year review process substitutes for the
interested-party petition process” and so should be governed
by the petition process deadline.

   We disagree. Contrary to Coos County’s view, the “in
accordance with” clause of 16 U.S.C. § 1533(c)(2) does not
incorporate the deadlines (and corresponding duties) associ-
ated with the petition process. To explain why requires us to
discuss in some detail the text and context of 16 U.S.C.
§ 1533; cf., e.g., K & N Engineering, Inc. v. Bulat, 

, 1081 (9th Cir. 2007) (“Statutory interpretation begins
with the plain language of the statute.”) (internal quotation
marks omitted), as well as the regulations implementing the
statute.

             1.   Text and Statutory Structure

   Section 4 of the ESA, which is codified at 16 U.S.C. § 1533
(hereinafter § 1533), sets out “two methods . . . for listing spe-
cies for protection as endangered or threatened,” and, like-
wise, for making other determinations under the ESA
concerning those species. Ctr. for Biological Diversity v. Nor-
ton, 

, 834 (9th Cir. 2001). “One method allows
the Secretary to act on [his or] her own initiative to identify
species for protection [or for regulatory action, generally].
The second allows interested citizens to compel the Secre-
tary’s consideration of a species by filing a petition.” 

. . . important differences between the two meth-
ods that dictate how (and when) the Secretary” must act, how-
ever. 

flaw in Coos County’s statutory
argument is that it conflates these two different mechanisms,
inappropriately shoe-horning the five-year review process, a
statutory step of the kind conducted on the Secretary’s initia-
7492               COOS COUNTY v. KEMPTHORNE
tive, into the system of deadlines created to address citizen-
initiated petitions.

                   a.   The Text of the ESA

 i.    Coos County’s Interpretation of the “in accordance
                       with” Clause

  [1] Section 1533(b)(3) is the petition provision from which
Coos County draws its “promptly publish” requirement. One
point is immediately obvious: The unambiguous text of that
provision, quoted below in pertinent part, establishes that it
requires a petition to operate:

      (A) To the maximum extent practicable, within 90
      days after receiving the petition of an interested per-
      son under section 553(e) of Title 5, to add a species
      to, or to remove a species from, either of the lists
      published under subsection (c) of this section, the
      Secretary shall make a finding as to whether the peti-
      tion presents substantial scientific or commercial
      information indicating that the petitioned action may
      be warranted. If such a petition is found to present
      such information, the Secretary shall promptly com-
      mence a review of the status of the species con-
      cerned. The Secretary shall promptly publish each
      finding made under this subparagraph in the Federal
      Register.

      (B) Within 12 months after receiving a petition that
      is found under subparagraph (A) to present substan-
      tial information indicating that the petitioned action
      may be warranted, the Secretary shall make one of
      the following findings:

      (i) The petitioned action is not warranted, in which
      case the Secretary shall promptly publish such find-
      ing in the Federal Register.
                  COOS COUNTY v. KEMPTHORNE                   7493
    (ii) The petitioned action is warranted, in which case
    the Secretary shall promptly publish in the Federal
    Register a general notice and the complete text of a
    proposed regulation to implement such action in
    accordance with paragraph (5).

    (iii) The petitioned action is warranted, but that—

         (I) the immediate proposal and timely pro-
         mulgation of a final regulation implement-
         ing the petitioned action in accordance with
         paragraphs (5) and (6) is precluded by
         pending proposals to determine whether
         any species is an endangered species or a
         threatened species, and

         (II) expeditious progress is being made to
         add qualified species to either of the lists
         published under subsection (c) of this sec-
         tion and to remove from such lists species
         for which the protections of this chapter are
         no longer necessary,

         in which case the Secretary shall promptly
         publish such finding in the Federal Regis-
         ter, together with a description and evalua-
         tion of the reasons and data on which the
         finding is based.

§ 1533(b)(3) (emphases added).

   [2] The piece of this provision which Coos County primar-
ily seizes upon, § 1533(b)(3)(B)(ii) is, plainly, part of the peti-
tion process — indeed, the words “petition” or “petitioned”
appear sixteen times in the text of § 1533(b)(3)(B), including
in § 1533(b)(3)(B)(ii) itself. Equally plainly, the petition pro-
cess is explicitly governed by a series of carefully calibrated
deadlines. The system of deadlines for the petition process is
7494             COOS COUNTY v. KEMPTHORNE
demanding and relatively clear: First, “[t]o the maximum
extent practicable, within 90 days after receiving the petition
of an interested person . . . the Secretary shall make a finding
as to whether the petition presents substantial scientific or
commercial information indicating that the petitioned action
may be warranted.” § 1533(b)(3)(A). The finding shall be
“promptly publish[ed]” in the Federal Register, and the Secre-
tary is to “promptly commence” a review if further action is
warranted. 

circumstances shall this initial ninety-day
determination take more than a year. Biodiversity Legal
Found. v. Badgley, 

, 1176 (9th Cir. 2002). And,
within 12 months of receiving the petition, the Secretary must
decide whether the petitioned action is warranted, warranted
but precluded, or not warranted. §§ 1533(b)(3)(B)(i)-(iii). No
matter what FWS determines, its decision is to be “promptly
publish[ed] in the Federal Register.” 

the
petitioned action is warranted,” a proposed rule is to be
promptly published, “in accordance with [§ 1533(b)(5)].” 

   [3] In contrast, the five-year review provision does not con-
tain any explicit publication deadlines, although it, like the
petition provision, contemplates “a review of the status of the
species concerned.” Compare § 1533(b)(3)(A) with
§ 1533(c)(2). The statute thus sets out two review processes,
one with deadlines, one without, and includes deadlines only
for the petition process.

   [4] To the extent that § 1533(b)(3) sets deadlines for
petition-initiated actions only, the directive in the five-year
review section, § 1533(c)(2), that “[e]ach determination . . .
shall be made in accordance with the provisions of
[§ 1533(b)]” could not possibly require the application of
deadlines that, in the incorporated section, depend on a cir-
cumstance not here present, namely, a petition. To require the
agency to act according to those deadlines would not mandate
the making of the determination “in accordance with” the pro-
visions, as § 1533(c)(2) requires. Instead, it would mandate
                 COOS COUNTY v. KEMPTHORNE                 7495
the opposite — making the determination not in accordance
with § 1533(b), by applying deadlines explicitly applicable
under § 1533(b) only when there is a citizen petition to a cir-
cumstance in which there has been no such petition.

   Further, Coos County’s theory of the “in accordance with”
clause would require courts to embark upon an entirely inap-
propriate exercise in judicial invention. Section 1533(b)(3)(B)
sets out many deadlines for reviews triggered by citizen peti-
tions, some of which have no possible application here. For
example, there is no possible reason for requiring FWS to
make ninety-day findings concerning its own five-year
reviews, nor to publish such tentative conclusions, as it does
for petitions. See § 1533(b)(3)(A). Coos County does not sug-
gest otherwise. Instead, Coos County would require us to pick
and choose among the portions of the petition provision to
decide which are applicable to the five-year review provision.
We cannot read the “in accordance with” clause as bestowing
on the courts such a statutory revision project.

   Interpreting the “in accordance with” clause in the five-year
review determination as incorporating the petition provisions
would also lead to strange results elsewhere in § 1533, where
essentially identical language is used. In § 1533(a)(1), for
example, the statute provides that “[t]he Secretary shall by
regulation promulgated in accordance with subsection (b) of
this section determine” (emphasis added) whether species are
endangered or threatened; and, in § 1533(a)(3)(A), the Secre-
tary is directed to “by regulation promulgated in accordance
with subsection (b) of this section” (emphasis added) desig-
nate critical habitat for endangered and threatened species.
Coos County does not argue that these tasks, too, are to be
undertaken under the petition deadlines in subsection (b),
despite the relevant provisions’ use of the same “in accor-
dance with subsection (b)” language present in § 1533(c)(2).
Yet, we are offered no principled basis to support treating
§§ 1533(a)(1)(A) and (a)(3)(A) differently than the five-year
review provision. Far more sensible than supposing that only
7496             COOS COUNTY v. KEMPTHORNE
one of three “in accordance with” clauses incorporates the
petition provision is to conclude that none of them do so.

   In sum, we find nothing in § 1533(c)(2), or in the ESA gen-
erally, to support Coos County’s tortured reading of the stat-
ute’s plain text.

   ii.   The Proper Construction of the “in accordance
                      with” Clause

   The text of the statute points to a much simpler, and much
more logical, interpretation of the “in accordance with”
clause. Most of the provisions of §§ 1533(a) and (b) govern
the decisionmaking process in general, not the petition pro-
cess in particular. Section 1533(c)(2) is naturally read as man-
dating that “[e]ach [five-year review] determination . . . shall
be made in accordance with” those generally applicable provi-
sions. Indeed, if five-year review determinations were not
made in accordance with those provisions, the ESA’s pur-
poses would be quite ill-served.

   Among the most important of those provisions is
§ 1533(a)(1), which sets out the factors to be considered in
making a listing decision:

     The Secretary shall by regulation promulgated in
     accordance with subsection (b) of this section deter-
     mine whether any species is an endangered species
     or a threatened species because of any of the follow-
     ing factors:

     (A) the present or threatened destruction, modifica-
     tion, or curtailment of its habitat or range;

     (B) overutilization for commercial, recreational, sci-
     entific, or educational purposes;

     (C) disease or predation;
                 COOS COUNTY v. KEMPTHORNE                    7497
    (D) the inadequacy of existing regulatory mecha-
    nisms; or

    (E) other natural or manmade factors affecting its
    continued existence.

These factors are of obvious relevance to five-year reviews,
which result in determinations about whether a reviewed spe-
cies’s listing should be changed or remain the same.

   Also critical to all ESA determinations is § 1533(b)(1)(A),
which dictates the information upon which determinations are
to be based:

    The Secretary shall make determinations required by
    subsection (a) (1) of this section solely on the basis
    of the best scientific and commercial data available
    to him after conducting a review of the status of the
    species and after taking into account those efforts, if
    any, being made by any State or foreign nation, or
    any political subdivision of a State or foreign nation,
    to protect such species, whether by predator control,
    protection of habitat and food supply, or other con-
    servation practices, within any area under its juris-
    diction, or on the high seas.

Again, were a five-year review determination not to rely
“solely on the basis of the best scientific and commercial data
available,” it would not be made “in accordance with” the
statute. It is provisions like these — which generally direct
how determinations regarding listings are to be made and
implemented — that § 1533(c)(2) incorporates.

   [5] In sum, our construction of § 1533(c)(2)’s “in accor-
dance with” clause as incorporating provisions which gener-
ally govern determinations, and not the deadlines that pertain
only to petitions, is well supported by the text. Coos County’s
7498              COOS COUNTY v. KEMPTHORNE
reading of the statute is, on the other hand, flatly contradicted
by the plain language of the ESA.

                   b.   Statutory Structure

   Coos County’s construction of § 1533(c)(2) disregards not
only the statutory language but the overall structure of the
ESA, which, as we have indicated, reflects a basic distinction
between agency-initiated determinations and determinations
triggered by citizen petition. “Under the first method [of mak-
ing determinations], the Secretary may, on [his or] her own
accord, consider whether a species is eligible for protection as
endangered or threatened.” Ctr. for Biological 

. If the Secretary determines that a species is “en-
dangered or threatened,” he or she “must publish a proposed
rule identifying the species as such.” 

(citing 50
C.F.R. § 424.11 (discussing circumstances in which a species
“shall be listed or reclassified”)).

   [6] Importantly, the statute provides no timeline governing
the period which begins when the Secretary commences his
or her own deliberations and ends with the publication of a
proposed rule. Deadlines governing agency-initiated listing
decisions appear only in provisions governing the publication
process itself. See §§ 1533(b)(5)(A), (b)(6)(A). So, while a
delay between an agency-initiated determination, including a
five-year review determination, and publication of a proposed
rule might be so long as to amount to a judicially-enforceable
breach of statutory duty, a matter we consider briefly below,
there is no fixed deadline for publication.

   In practice, the period between the Secretary’s first consid-
eration of an action concerning a species and the publication
of a proposed rule implementing that action can be quite
lengthy. For example, the Secretary may conclude that more
research is required before publishing a proposed rule of any
kind. Specifically, after considering the relevant factors, he or
she may determine that “one of the actions” available with
                    COOS COUNTY v. KEMPTHORNE                      7499
regard to a species “may be warranted, but that the available
evidence is not sufficiently definitive to justify proposing the
action at that time.” 50 C.F.R. § 424.15(a). If so, the Secretary
“may” publish a brief notice so stating in the Federal Register.

cases, species considered candidates for listing
may “sit on candidate lists for extraordinarily long periods
before becoming the subject of protective rules.” Ctr. for Bio-
logical 

. Moreover, the Secretary
will often assign a low priority to removing a species from the
endangered or threatened species list, which is the action that
Coos County argues is appropriate here. See Endangered and
Threatened Species Listing and Recovery Priority Guidelines,
48 Fed. Reg. 43,098, 43,100 (Sept. 21, 1983) (“Priority
Guidelines”). So the Secretary enjoys considerable scheduling
discretion in the management of listing and research priori-
ties.

   After the basic provisions of the ESA as it now exists were
enacted in 1973, Congress became aware that such delays
could sometimes undermine implementation of the statutory
scheme. As a result, “[i]n order to force action on listing and
delisting proposals, [it] amended the ESA[ ] . . . to provide
certain mandatory deadlines by which the Secretary must act”
when presented with a citizen petition. Ctr. for Biological

(citations and quotation marks
omitted); see Endangered Species Act Amendment of 1982,
Pub. L. No. 97-304, § 2, 96 Stat. 1411, 1412-14 (1982)
(adding the petition process deadlines).10 The petition process
and its deadlines are set out at § 1533(b)(3), which we have
quoted and outlined above. This process, which “[e]mbrac[es]
citizen participation,” Biodiversity Legal 

, is “intended . . . to interrupt the [FWS’s] priority system
by requiring immediate review.” 

77 (quoting Ctr. for
Biological 

, alteration and quotation
marks omitted). It “replace[s] the Secretary’s discretion with
  10
   In Center for Biological Diversity, we wrongly stated that this amend-
ment was made in 1992. 

.
7500             COOS COUNTY v. KEMPTHORNE
mandatory, nondiscretionary duties.” Ctr. for Biological

(alteration and quotation marks
omitted).

   Coos County’s radical construction of the “in accordance
with” clause of the five-year review provision, § 1533(c)(2),
would, as we have explained, import at least one of the peti-
tion process’s deadlines into the agency-initiated five-year
review process. It would, as a result, turn the five-year review
process into a hybrid of the two, otherwise distinct, decision-
making models that the ESA sets out. Moreover, as we have
demonstrated, 

Part II(B)(1)(A)(i), applying the peti-
tion deadlines to the five-year review process would entail
considerable judicial ingenuity, as some of the petition dead-
lines simply have no sensible application to the five-year
review process.

   “The petition process strikes a delicate balance between
judicial review, agency expertise and the public’s right to a
healthy, sustainable ecosystem which fosters biological diver-
sity.” Wyoming v. U.S. Dep’t of the Interior, 

, 1229 (D. Wyo. 2005), aff’d on other grounds, 

(10th Cir. 2006). Its “statutory requirements are not
mere bureaucratic hoops to jump through, but rather are the
stated will of Congress, and the people, and as such should be
adhered to with great care.” 

Importing some —
but not all — of the petition process into the agency-initiated
process risks upsetting that delicate balance. Our construction,
in contrast, maintains the ESA’s usual division between
agency-initiated determinations and petition-driven actions.

                       2.   Regulations

   The ESA’s implementing regulations support our view that
the last sentence of § 1533(c)(2) is intended only to ensure
that five-year review determinations are made consistently
with the process provided for agency-initiated determinations
in subsections (a) and (b), and with the substantive standards
                       COOS COUNTY v. KEMPTHORNE                       7501
that apply generally under those subsections to listing-related
determinations.

   The regulation governing five-year reviews, 50 C.F.R.
§ 424.21, does not contain any “promptly publish” require-
ment for proposed rules based upon five-year review determi-
nations. Instead, it requires that “[a] notice announcing those
species under active review . . . be published in the Federal
Register,” but does not mandate publishing five-year review
determinations at all, much less developing and publishing
rules resulting from them. Id.11

   Moreover, 50 C.F.R. § 424.21 provides, in language echo-
ing the last sentence of § 1533(c)(2), that five-year review
determinations “shall be made in accordance with” three regu-
lations which parallel the statutory provisions applying to
determinations generally, not the statutory petition process
provisions. See 

of these regulations, 50 C.F.R.
§ 424.11, tracks §§ 1533(a)(1) and (b)(1)(A): It sets out
“[f]actors for listing, delisting, or reclassifying species,” dis-
cusses when species “shall be listed or reclassified” or “may”
be delisted due to these factors, and provides that determina-
tions are to be made on “the basis of the best scientific and
commercial data available.” The second, 50 C.F.R. § 424.16,
like § 1533(b)(5), provides a procedure for publishing pro-
posed rules that applies to both petition-initiated rules and to
rules proposed as a result of agency-initiated determinations.
Finally, the third regulation, 50 C.F.R. § 424.17, like
  11
    In full, 50 C.F.R. § 424.21 provides:
       At least once every 5 years, the Secretary shall conduct a review
       of each listed species to determine whether it should be delisted
       or reclassified. Each such determination shall be made in accor-
       dance with §§ 424.11, 424.16, and 424.17 of this Part, as appro-
       priate. A notice announcing those species under active review
       will be published in the Federal Register. Notwithstanding this
       section’s provisions, the Secretary may review the status of any
       species at any time based upon a petition (see § 424.14) or upon
       other data available to the Service.
7502                 COOS COUNTY v. KEMPTHORNE
§ 1533(b)(6), sets out the deadline for making a decision on
a final rule following the publication of a proposed rule.

   [7] In short, the regulations implementing § 1533(c)(2)
fully support the reading we have adopted. The regulations
specify how a determination during the five-year review pro-
cess is to be made and provide guidance on the publication of
proposed and final rules arising from that process, without
importing any of the deadlines from the petition process into
the five-year review determination.

  C.    Coos County’s “Failure to Act” Causes of Action

   [8] Given the construction of § 1533(c)(2) we adopt, Coos
County’s causes of action challenging FWS’s failure to act to
delist the tri-state murrelets cannot go forward. As we
explained earlier, the ESA and APA provisions under which
Coos County filed its complaint require that it be able to
allege either, under the ESA, “a failure of the Secretary to
perform any act or duty under section 1533 . . . which is not
discretionary with the Secretary,” 16 U.S.C. § 1540(g)(1)(C),
or, under the APA, that FWS has “failed to take a discrete
agency action that it is required to take,” 

(interpreting 5 U.S.C. § 706(1), emphases in original).
Coos County cannot meet these requirements.12
  12
     We note, in that regard, that National Ass’n of Home Builders v. Nor-
ton, 

(9th Cir. 2003), and Northwest Ecosystem Alliance v.
U.S. Fish & Wildlife Serv., 

(9th Cir. 2007), upon which
Coos County relies, do not support its position that the Five-Year Review
is reviewable, or that the Review’s final determination not to delist the tri-
state murrelets is improper.
   In National Ass’n of Home Builders, we reviewed “a final rule listing
the Arizona pygmy-owl[ ] as endangered” as a distinct population seg-
ment. 

The National Association of Home Builders contended
that the owls were not a distinct population segment and so could not be
listed as one. 

Because FWS had not articulated a rational basis
for its designation, we remanded to the district court for further proceed-
ings. 

                     COOS COUNTY v. KEMPTHORNE                         7503
   [9] Preliminarily, we hold that Coos County’s 5 U.S.C.
§ 706(1) cause of action is precluded because it is identical in
all relevant respects to the ESA cause of action, which pro-
vides Coos County with an “adequate remedy.” See 

. In so determining, we acknowledge that
“[n]othing in the ESA’s citizen-suit provision expressly pre-
cludes review under the APA,” and that “the causes of action
against the Secretary set forth in the ESA’s citizen-suit provi-
sion are [not] exclusive, [and do not] supplant[ ] those pro-
vided by the APA.” 

. Here, however,
Coos County’s APA argument exactly “duplicates the one [it]
brought under the [ESA]. Because review of [Coos County’s]
claim is available under the [ESA], it is not subject to review
under the APA.” Hayes v. Whitman, 

, 1025
(10th Cir. 2001) (emphasis in original); see also Bowen v.
Massachusetts, 

, 903 (1988) (“Congress did not
intend the general grant of review in the APA to duplicate
existing procedures for review of agency action.”).

   The remaining — ESA — cause of action cannot succeed
either. As we have demonstrated, the deadlines which the
ESA applies to the petition process are not incorporated, sub
silentio, into the five-year review provision. There can there-
fore be no violation of § 1533(b)(3)(B)(ii)’s “promptly pub-

   Similarly, Northwest Ecosystem Alliance held only that the DPS Policy
itself was a reasonable construction of the 

, and that
FWS’s denial of a petition to list a population of squirrels as a distinct
population segment was not arbitrary and capricious. 

50.
   National Ass’n of Home Builders and Northwest Ecosystem Alliance
establish that we may review a final rule listing a distinct population seg-
ment under the DPS Policy, and that we may also review FWS’s denial
of a petition to list a population under the Policy. They did not consider
whether a five-year review determination imposes nondiscretionary duties
on FWS promptly to publish a proposed rule, nor whether a population
that occupies a significant portion of a species’ range may be listed even
if it is not a distinct population segment. As such, they bear only a tangen-
tial connection to the questions in this case.
7504                  COOS COUNTY v. KEMPTHORNE
lish” requirement based upon the determination made in the
Five-Year Review.13

  We need not determine whether we nonetheless retain
authority to compel FWS to publish at some point a proposed
regulation based upon a five-year review determination to
change a species’s listing, cf. Forest Guardians v. Babbitt,

, 1270-73 (10th Cir. 1998), because FWS here
determined that the tri-state murrelets’ listing status should
not be changed. See Five-Year Review at 21, 28.

   The ESA and APA provisions under which Coos County
brought suit allow challenges to FWS’s alleged failure to act,
not to the substantive content of its actions. This principle is
entirely clear in the 5 U.S.C. § 706(1) context and, as
§ 1540(g)(1)(C) likewise concerns failures to act, it is neces-
sarily also so limited. See, e.g., 

(explaining that § 1540(g)(1)(C) may be used to challenge
“the omission of . . . required procedures”); Mt. St. Helens
Mining & Recovery Ltd. P’ship v. United States, 

, 728 (9th Cir. 2004) (“[Section] 706(1) generally only
allows the district court to compel an agency to take action,
rather than compel a certain result, when action is unlawfully
withheld.”). So, in considering whether FWS has fulfilled any
duties arising from its determination, we must look to the
determination FWS actually made.

  FWS determined that delisting the tri-state murrelets was
not warranted because the interim delisting criteria in the
Recovery Plan had not been met and “[t]he threat situation
  13
     At argument, counsel for Coos County posited that deadlines might
alternatively be found in § 1533(c)(1), which provides that “[t]he Secre-
tary shall from time to time revise each list . . . to reflect recent determina-
tions, designations, and revisions made in accordance with subsections (a)
and (b) of this section.” That provision requires FWS only to revise the
list “from time to time,” to reflect “recent determinations”; it does not
create a duty promptly to publish a proposed or final rule based upon a
five-year review determination.
                     COOS COUNTY v. KEMPTHORNE                          7505
has not changed” in a way that would alleviate the threat to
the species. Five-Year Review at 17-18, 21. It concluded that
a “range-wide status review” was the next appropriate step.

In effect, FWS concluded that “the available evi-
dence is not sufficiently definitive to justify proposing” any
changes to the murrelets’ status at this time, see 50 C.F.R.
§ 424.15, and that what information it did have showed that
the threats to the species continued. Also, in connection with
the distinct population segment issue that so concerns Coos
County, FWS explained that “a court found that, as the murre-
let qualifies for listing throughout a significant portion of its
range, ‘there is no need to consider the alternative basis of
whether the tri-state population is a distinct population seg-
ment.’ ” Five-Year Review at 6 (quoting Marbled Murrelet,
No. C91-522R at 12). So, FWS gave reasons for continuing
the listing, entirely independent of its distinct population seg-
ment determination.14 No duty to delist can possibly arise
from FWS’s determination that delisting was not warranted.15
  14
      Coos County did allege in its complaint that FWS “determined . . . the
tri-state murrelets . . . should be removed from the list of endangered and
threatened wildlife.” But the Review was attached to the complaint, and
it simply does not say what Coos County alleged; it says the opposite. “A
copy of a written instrument that is an exhibit to a pleading is a part of the
pleading for all purposes.” Fed. R. Civ. P. 10(c); see also Outdoor Media
Group, Inc. v. City of Beaumont, 

, 899 (9th Cir. 2007)
(“When ruling on a motion to dismiss, we may generally consider only
allegations contained in the pleadings, exhibits attached to the complaint,
and matters properly subject to judicial notice.”) (internal quotation marks
omitted).
   15
      Coos County suggests, in an aside, that the Five-Year Review violates
16 U.S.C. § 1533(b)(1)(A), which provides in pertinent part that “[t]he
Secretary shall make determinations required by subsection (a)(1) of this
section solely on the basis of the best scientific and commercial data avail-
able to him.” Because the last sentence of 16 U.S.C. § 1533(c)(2) incorpo-
rates this provision, as we have explained, FWS does have such a duty
when making its five-year review determinations. See 

(FWS has no “discretion to ignore the required procedures of deci-
sionmaking”). Save for expressing its disagreement with FWS’s conclu-
sions, however, Coos County does not explain how this provision was
7506                  COOS COUNTY v. KEMPTHORNE
FWS thus also has not failed to act upon any duty to publish
a proposed delisting rule in accordance with § 1533(b)(5), or
to publish a final rule in accordance with § 1533(b)(6).

   [10] In short, Coos County has not alleged a failure to per-
form a nondiscretionary act or duty imposed by § 1533,
whether premised on the petition process deadlines or on the
agency’s more general duty to act on its own determinations.
It has therefore failed to state a claim on its “failure to act”
causes of action.16

violated. Cf. United States v. Kimble, 

, 715 n.2 (9th Cir.
1997) (holding that an “argument [that] was not coherently developed in
[the] briefs on appeal” was abandoned). Moreover, this allegation cannot
be found in the complaint, even under the notice pleading standard, see
Fed. R. Civ. P. 8(a), (e), so the district court properly did not consider it.
   16
      As noted earlier, supra note 8, Coos County maintains that its com-
plaint also contained a 5 U.S.C. § 706(2)(C) argument, challenging FWS’s
decision to maintain the tri-state murrelet listing as “in excess of [the
agency’s] statutory jurisdiction.” A violation of this specific provision was
not alleged in the complaint, and the district court did not rule upon it.
Nonetheless, “[n]otice pleading requires the plaintiff to set forth in his
complaint claims for relief, not causes of action, statutes or legal theories,”
Alvarez v. Hill, 

, 1157 (9th Cir. 2008) (emphasis in origi-
nal), and the complaint, fairly read, did allege that FWS was acting with-
out legal authority.
   But Coos County only mentions a distinct § 706(2)(C) argument fleet-
ingly in its opening brief, and does so by ignoring entirely the “significant
portion of the range” rationale that led to the original listing. See Ghahre-
mani v. Gonzales, 

, 997 (9th Cir. 2007) (holding such a
sketchily-made argument abandoned); cf. Defenders of Wildlife v. Norton,

, 1145 (9th Cir. 2001) (citing the tri-state murrelet listing
as an example of a species properly listed in a significant portion of its
range). Coos County finally fleshes out its position in its reply brief, mak-
ing clear that it is really arguing that the Listing Rule’s “significant portion
of the range” rationale for protecting the tri-state murrelets, which is inde-
pendent of the “distinct population segment” rationale, is a “[m]ere unsup-
ported assertion[ ].” In its view, FWS “provided absolutely no evidence”
to support the “significant portion of the range” finding in the original Pro-
posed Rule, lacked authority to list the population on that ground in the
                     COOS COUNTY v. KEMPTHORNE                           7507
                        III.    CONCLUSION

   [11] We hold that the dismissal of Coos County’s com-
plaint was entirely proper.

   Coos County, however, is not without recourse. It may file
a delisting petition. As the District Court for the District of
Columbia put it while granting summary judgment to the gov-
ernment in American Forest Research Council v. Hall, 533 F.
Supp. 2d 84, 93 (D.D.C. 2008), an action brought by other
parties challenging the tri-state murrelet Five-Year Review on
grounds very similar to those in this case: “[I]f [Coos County]
believes that the threatened listing of the tri-state population
causes [the County] unwarranted injury, [it] has the right and
the ability to petition FWS to delist the tri-state population of
the marbled murrelet. . . . But [Coos County] has failed to
pursue this course of 

.

   Coos County maintains that FWS has already drawn con-
clusions in a five-year review, so that it would be futile now
to file a petition. That argument relies on Coos County’s erro-
neous belief that the five-year review and petition processes
substitute for each other. They do not.

first place, and so could not continue the listing after the Five-Year
Review.
   “The general rule is that appellants cannot raise a new issue for the first
time in their reply briefs.” 

n.3 (internal quo-
tation marks omitted). We decline to consider Coos County’s last-minute
arguments, which have never been fully briefed or argued before us or the
district court. Besides, the statute of limitations for such a challenge to the
original Listing Rule expired long ago. Whatever effect the original List-
ing Rule has on Coos County began with the Rule’s publication in 1992,
and has not been altered by the Five-Year Review. Cf. Wind River Mining
Corp. v. United States, 

, 713, 715 (9th Cir. 1991) (holding
that the six-year statute of limitations set out by 28 U.S.C. § 2401(a)
applies, with restrictions not relevant here, to APA challenges to allegedly
ultra vires agency decisions).
7508              COOS COUNTY v. KEMPTHORNE
   The Five-Year Review here functioned as it was supposed
to: It provided useful information that prompted FWS to con-
sider broadening protections for the murrelets, and to consider
revising aspects of its current listing. It also provided informa-
tion to Coos County and other interested members of the pub-
lic, including parties who may decide, based on the
information provided in the Five-Year Review, to file a delist-
ing petition. To separate this process from the petition process
makes perfect sense.

   Nor would such a petition be futile. FWS’s conclusions in
five-year reviews are not set in stone. Rather, five-year
reviews provide useful guidance on the rationales and data
presently supporting an ESA listing, point up remaining
uncertainties, and allow petitioners to marshal arguments and
information that the agency may find germane in light of the
review. The extensive public process triggered by the filing of
a petition may well change the agency’s mind. For instance,
in this case FWS indicated that it would find more informa-
tion on the range-wide health of the murrelets helpful in
deciding on a future course of action. True, a petition still
may not succeed, but the fact that some petitions will lack
merit does not mean that five-year reviews render petitions
futile as a general matter, or in this case.

   In sum, our view of Coos County’s suit resembles that of
the court in Wyoming v. U.S. Dep’t of the Interior, which also
considered an attempt to avoid the petition process through an
effort to establish a “mandatory duty to delist” by other
means. 

, 1244-45. We are “at
a loss to explain the actions of [Coos County].” 

It could easily have filed a delisting petition — years ago.
“This action, if it had been taken, would have forced the Fed-
eral Defendants to make choices under hard deadlines set by
Congress . . . . and much of the Federal Defendants’ argu-
ments presented here would have melted away, allowing this
Court to reach the merits of many of [Coos County’s]
claims.” 

v. KEMPTHORNE                   7509
   If Coos County wishes to force FWS to act swiftly on del-
isting the tri-state murrelets, the petition process is open to it.

  AFFIRMED.