Endangered Species Law & Policy

On April 17, 2025, the U.S. Fish & Wildlife Service (USFWS) and National Marine Fisheries Service (NMFS) (collectively, Services) published a notice in the Federal Register proposing to rescind the Services’ respective definitions of “harm” under the Endangered Species Act (ESA) (Proposed Rule). The notice indicates the Services will accept comments on the Proposed Rule until May 18.

Section 9 of the ESA prohibits “take” of endangered species and the Services have extended the “take” prohibition, by regulation, to many species listed as threatened under the ...

On March 29, 2025, the U.S. District Court for the Western District of Texas (District Court) vacated the Endangered Species Act (ESA) special 4(d) rule for the northern distinct population segment (DPS) of the lesser prairie-chicken (LEPC). The 4(d) rule had prohibited, in most circumstances, “take” of the species’ northern DPS. Plaintiffs challenged the 4(d) rule in a number of ways, including on grounds that the U.S. Fish and Wildlife Service (Service) should have considered the economic impact of the 4(d) rule prior to its promulgation. As a result of the vacatur, it ...

On January 20, 2025, President Trump issued Executive Order 14154, “Unleashing American Energy,” which requires all agencies to identify actions that potentially burden deployment of domestic energy resources and develop plans to revise, rescind, and suspend any such actions (Executive Order). On February 3, 2025, Secretary of the Interior, Doug Burgum (Secretary), issued Secretarial Order 3418, “Unleashing American Energy” (Secretarial Order), which provides 15 days for agencies within the Department of the Interior to submit a plan on how they will comply with the Executive Order. … 

On January 20, 2025, the U.S. Fish & Wildlife Service (Service) will publish a positive 90-day finding on a 2016 petition (Petition) to delist the golden-cheeked warbler (Setophaga chrysoparia) (GCWA). The decision comes on the heels of the agency’s recent recommendation to downlist the GCWA from endangered to threatened. Pursuant to Endangered Species Act section 4 and relevant implementing regulations, the Service will receive information from the public to inform a more detailed status review, and will publish a 12-month finding in which the agency will make a final ...

On January 7, 2025, the U.S. Fish & Wildlife Service (Service) announced that, following the completion of the Service’s 5-year status review (5-year Review) of the golden-cheeked warbler (Setophaga chrysopharia) (GCWA), the agency is recommending the species be downlisted from endangered to threatened under the Endangered Species Act (ESA). The species will remain listed as endangered unless and until the species is formally downlisted under the ESA pursuant to the necessary rulemaking process.

Citing better understanding of the GCWA and its habitat needs, along with ...

On December 10, 2024, the U.S. Fish and Wildlife Service (Service) released its long-anticipated listing proposal for the monarch butterfly (Danaus plexippus), along with a proposed critical habitat designation and species-specific 4(d) rule (Proposed Rule). The Proposed Rule indicates the public comment period closes on March 12, 2025.

The Service has proposed listing the monarch as threatened primarily as a result of threats from past and ongoing loss and degradation of breeding, migratory, and overwintering habitat, exposure to insecticides, and the effects of climate ...

Today, the U.S. Fish and Wildlife Service (Service) announced it had opened status reviews for 38 species of plants, wildlife, and fish endemic to Texas, New Mexico and Arizona (Southwest Species). Section 4(c) of the Endangered Species Act (ESA) requires the Service to evaluate the status of species listed as threatened and endangered at least once every five years (5-year Review) and determine, based on that evaluation, whether any such species should be delisted, downlisted (from endangered to threatened), … 

On Wednesday, October 23, 2024, the U.S. Fish and Wildlife Service (Service) released final guidance and tools (Final Guidance) to assist project proponents with Endangered Species Act (ESA) compliance with respect to the northern long-eared bat (Myotis septentrionalis) (NLEB) and the tricolored bat (Perimyotis subflavus) (TCB). The Final Guidance includes: (1) a step-by-step consultation guidance document which outlines a voluntary approach to streamline ESA section 7 consultation for the NLEB and/or TCB for project types other than wind turbine operation and ...

On September 17, 2024, the U.S. Fish and Wildlife Service (Service) proposed listing the Kentucky creekshell (Villosa ortmanni) as an endangered species under the Endangered Species Act (ESA) and designating critical habitat for the species (Proposed Rule). The freshwater mussel is found in rivers and streams in both Kentucky and Tennessee. Historically, the species was found in thirteen river basins in southern Kentucky and northern Tennessee, but it has been extirpated from four of those basins.

The Proposed Rule identifies water quality degradation, urbanization ...

On September 5, 2024, the U.S. District Court for the Western District of Texas held in General Land Office v. U.S. Department of the Interior, that the U.S. Fish and Wildlife Service (Service) improperly denied a petition to delist the federally-endangered golden-cheeked warbler (Setophaga chrysoparia) (GCWA) by holding the petition to an unlawfully heightened standard at the initial, 90-day finding stage. As a result of the court’s ruling, the Service is required to undertake a review of the GCWA delisting petition and make a 90-day finding as to whether the petition presents ...

On September 4, 2024, the Center for Biological Diversity, along with more than 20 other groups, (collectively, CBD) delivered a petition (Petition) to the U.S. Fish and Wildlife Service (Service) in which CBD requested the Service promulgate regulations establishing a process, set of criteria, and other requirements for permitting “take” of migratory birds as a result of colliding with buildings. Specifically, the Petition requests the Service require permits for new construction of buildings with glass facades or other features that would foreseeably lead to ...

On June 27, 2024, the U.S. Fish and Wildlife Service (Service) issued a final rule listing the Suwannee alligator snapping turtle (Macrochelids suwanniensis) as a threatened species with a 4(d) rule under the Endangered Species Act (ESA).

The Suwannee alligator snapping turtle is a large, freshwater turtle species occurring in the Suwannee River basin in Florida and Georgia. The species’ listing follows a 2012 petition filed by the Center for Biological Diversity to list 53 amphibians and reptiles, including the alligator snapping turtle (Macrochelys temminckii), which, due ...

On May 20, 2024, the U.S. Fish and Wildlife Service (Service) published a final rule listing the dunes sagebrush lizard (Scleroperus arenicolus) (DSL) as endangered (Final Rule) under the Endangered Species Act (ESA). In the Final Rule, the Service identifies habitat loss and fragmentation of dunelands associated with oil and natural gas production and frac sand mining as the primary threat to the species, with climate change causing additional impacts.

The Service received more than 18,000 comments on its proposed rule to list the DSL, with many urging the Service not to list the ...

Today, the U.S. Fish and Wildlife Service (Service) and Center for Biological Diversity entered into a settlement agreement wherein the Service agreed to submit to the Federal Register final listing decisions on the following six mussel species no later than May 23, 2024:

• Texas fatmucket (Lampsilis bracteate);
• Guadalupe fatmucket (Lampsilis bergmanni);
• Texas fawnsfoot (Truncilla macrodon);
• Texas pimpleback (Cyclonaias (= Quadrula) petrina);
• Guadalupe orb (Cyclonaias necki); and
• False spike (Fusconaia (= Quincuncina) mitchelli).

As Nossaman previously reported, on ...

Tomorrow, the U.S. Fish and Wildlife Service (Service) will publish its final rule updating regulations implementing section 10 of the Endangered Species Act (Section 10), which addresses the agency’s issuance of incidental take permits and enhancement of survival permits under Section 10. The final rule will take effect 30 days after publication in the Federal Register. In the preamble to the final rule, the Service indicates that applications for permits under Section 10 that have been processed and published in the Federal Register for publication prior to the effective ...

On March 27, 2024, the U.S. Fish and Wildlife Service (USFWS) and National Marine Fisheries Service (NMFS) (collectively, the Services) made available pre-publication versions of the agencies’ long-awaited updates to regulations implementing sections 4 and 7 of the Endangered Species Act (ESA). The Services have finalized joint rules addressing interagency consultation requirements under ESA section 7 and the procedures for listing, reclassifying, delisting, and designating critical habitat for species under ESA section 4; and USFWS has finalized its reinstatement of ...

On February 28, 2024, the U.S. District Court for the District of Columbia upheld the U.S. Fish and Wildlife Service’s (Service) denial of a petition filed by the New Mexico Cattle Growers’ Association (Cattle Growers) urging the Service to remove the southwestern willow flycatcher (Empidonax traillii extimus) (flycatcher) from the list of endangered species (Petition). The Cattle Growers had argued that the Service’s denial of the Petition, and specifically the agency’s finding that the flycatcher is a valid subspecies of the unlisted willow flycatcher, violated the ...

On February 12, 2024, the U.S. Fish and Wildlife Service (Service) published a final rule creating new permitting pathways and revising existing regulations for the take of bald eagles (Haliaeetus leucocephalus) and golden eagles (Aquila chrysaetos). Bald and golden eagles are protected under the Bald and Golden Eagle Protection Act (BGEPA), which prohibits take of the species except pursuant to federal regulations. The updated rule is the result of a settlement agreement between the Service and the Energy Wildlife and Action Coalition, which prompted the Service to revisit its ...

On February 1, 2024, the Center for Biological Diversity (CBD) filed an amended complaint (Complaint) in the U.S. District Court of Arizona, alleging the U.S. Fish and Wildlife Service (Service) failed to timely analyze the harmful effects of six pesticides on species listed under the Endangered Species Act (ESA) and their habitats. The lawsuit stems from the Service’s failure to issue biological opinions to the Environmental Protection Agency (EPA) in response to that agency’s request for formal ESA section 7 consultation with the Service over the EPA’s 2017 and 2021 ...

On February 2, 2024, the U.S. Fish and Wildlife Service (Service) published a final rule increasing civil monetary penalties for violations of several federal wildlife and natural resource protection laws (Final Rule).  The Final Rule updates penalties for violations of the Endangered Species Act, Marine Mammal Protection Act, Bald and Golden Eagle Protection Act, Lacey Act, and other statutes concerning federally protected animal species.

Under section 4 of the Federal Civil Penalties Inflation Adjustment Act of 1990, 28 U.S.C. 2461, as amended by the Inflation Adjustment ...

On December 21, 2023, I published a post on the Center for California Water Resources Policy and Management’s DeltaCurrents blog discussing integration of resource optimization into endangered species policy to improve conservation outcomes. Resource optimization is the allocation of finite resources in the most efficient manner possible. In the context of wildlife management, it is a structured process to select a management action from among available alternatives intended to result in the most efficient allocation of resources to achieve a specified objective. … 

As previously reported, on December 6, the Biden Administration published the Fall 2023 Unified Agenda of Regulatory and Deregulatory Actions (Unified Agenda), outlining the various regulatory and deregulatory actions the Biden Administration plans to take in the near future. Among the Unified Agenda entries are numerous U.S. Fish and Wildlife Service (Service) actions to propose or finalize endangered and threatened species listings and critical habitat designations under the Endangered Species Act (ESA). Below is a sampling of potential species listings and critical ...

As we have previously reported, on December 6, the Biden Administration released the Fall 2023 Unified Agenda of Regulatory and Deregulatory Actions (Unified Agenda). The Unified Agenda, published twice a year, lists the upcoming rulemakings, policies, notices, revisions, and other actions that federal executive agencies plan to complete over the next several months. This most recent iteration of the Unified Agenda is notable in that it represents the slate of actions the Biden Administration hopes to complete in advance of a potential change in administrations … 

As we have previously reported, on December 6, the Biden Administration released the Fall 2023 Unified Agenda of Regulatory and Deregulatory Actions (Unified Agenda), which lists the regulatory and deregulatory actions that federal administrative agencies—including the U.S. Fish and Wildlife Service (Service)—plan to take in the coming year. According to the Unified Agenda, the western United States can expect a number of proposed and final rules to list species as threatened or endangered under the Endangered Species Act (ESA) and to designate critical habitat ...

On December 6, the Biden Administration released the Fall 2023 Unified Agenda of Regulatory and Deregulatory Actions (Unified Agenda), which lists the regulatory and deregulatory actions the various federal administrative agencies—including the U.S. Fish and Wildlife Service (Service)—plan to take in the near future. The Office of Information and Regulatory Affairs publishes an updated Unified Agenda twice a year, in the spring and fall. There are numerous entries in the Unified Agenda addressing future action by the Service to list species as threatened or endangered ...

On November 30, 2023, the U.S. Fish and Wildlife Service (Service) published a final rule listing a distinct population segment (DPS) of the North American wolverine (Gulo gulo luscas) as a threatened species under the Endangered Species Act (ESA). The wolverine is a medium-sized carnivore found in Alaska, Canada and the western-northwestern United States. The current listing is limited to the DPS of wolverine occurring in the contiguous United States. In the Federal Register notice … 

On October 31, 2023, the U.S. Fish and Wildlife Service (Service) proposed listing the oblong rocksnail (Leptoxis compacta) as an endangered species under the Endangered Species Act (ESA). The freshwater snail exists only in the Cahaba River in central Alabama and subsists on algae growing on the riverbed. The oblong rocksnail was declared extinct in 2000 after several decades without a confirmed specimen observation and multiple river surveys. In 2011, a population was discovered which inhabits a 5.6 river mile stretch of the Cahaba River about 10 miles south of Birmingham ...

On September 30, 2023, the U.S. District Court for the District of Columbia granted summary judgment in favor of the U.S. Fish and Wildlife Service (Service) in a case challenging the agency’s final rule downlisting the American burying beetle (Nicrophorus americanus) to “threatened species” status under the Endangered Species Act (ESA).

In its opinion, the court held that the Service adhered to a reasonable interpretation of the ESA and followed proper procedures when deciding to downlist the American burying beetle to threatened status despite noting climate change ...

On October 3, 2023, the U.S. Fish and Wildlife Service (Service) published two proposed rules to list three species—the northwestern pond turtle (Actinemys marmorata), the southwestern pond turtle (Actinemys pallida), and the short-tailed snake (Lampropeltis extenuata)—as threatened under the Endangered Species Act (ESA). The proposed listings also include proposed 4(d) rules for each species. However, according to the Federal Register notices, the Service concluded that designating critical habitat for each of the three species is not currently determinable, and ...

On Tuesday, September 26, President Biden vetoed two Republican-sponsored joint resolutions, S.J. Res. 9 and S.J. Res. 24, seeking to undo Endangered Species Act (ESA) protections for the lesser prairie-chicken (LEPC) (Tympanuchus pallidicinctus) and northern long-eared bat (NLEB) (Myotis septentrionalis) that became effective in January 2023.

S.J. Res. 9 would have undone the U.S. Fish and Wildlife Service’s (Service) final rule listing the Northern distinct population segment (DPS) of the LEPC as threatened with a section 4(d) rule and the Southern DPS as endangered ...

On August 29, 2023, the U.S. Fish and Wildlife Service (Service) published a final rule listing two distinct population segments (DPS)—the North Feather and Central Coast DPSs—of the foothill yellow-legged frog (Rana boylii) (Frog) as threatened (Threatened DPSs) and two additional DPSs of the Frog—the South Sierra and South Coast DPSs—as endangered (Endangered DPSs) under the Endangered Species Act (ESA). In the preamble to the final rule, the Service indicated that designating critical habitat for all four DPSs of the Frog is not determinable at this time due to a lack ...

On August 11, 2023, the U.S. Fish and Wildlife Service (Service) published a proposed rule to delist the Apache trout (Oncorhynchus apache) under the Endangered Species Act (ESA) due to the species’ recovery.  The Apache trout, the state fish of Arizona, is a species of freshwater fish that is found primarily in the mountain region of southeast Arizona.  This species was initially listed as an endangered species under the ESA in 1967.  Then, in 1975, the Service downlisted the species to threatened status.  The ESA defines a threatened species as one that is “likely to become ...

On July 25, 2023, the U.S. Fish and Wildlife Service (Service) published a proposed rule to list two mussel species, the Salina mucket (Potamilus metnecktayi) and Mexican fawnsfoot (Truncilla cognata), as endangered under the Endangered Species Act (ESA). The Service also proposed to designate critical habitat for these species under the ESA. The proposed critical habitat for the Salina mucket would amount to approximately 200 river miles in the Texan counties of Brewester, Terrell, and Val Verde, and the proposed critical habitat for the Mexican fawnsfoot would amount to ...

On July 20, 2023, the U.S. Fish and Wildlife Service (Service) issued a final rule listing the cactus ferruginous pygmy-owl (Glaucidium brasilianum cactorum) (“Owl”) as a threatened subspecies with a 4(d) rule under the Endangered Species Act (ESA). The 4(d) rule prohibits the same activities prohibited for endangered species, but allows exemptions for certain education and outreach activities permitted under a Migratory Bird Treaty Act permit, surveying and monitoring in Arizona under a state scientific activity permit, and habitat restoration and enhancement ...

On June 22, 2023, the U.S. Fish and Wildlife Service (USFWS) and National Marine Fisheries Service (NMFS) (collectively, the Services), issued three sets of proposed revisions to their Endangered Species Act (ESA) regulations addressing: (1) interagency consultations under ESA section 7; (2) the procedures and criteria for listing, reclassifying, delisting, and designating critical habitat for species under ESA section 4; and (3) reinstatement of USFWS’s blanket ESA section 4(d) rule which, prior to its repeal in 2019, extended the take prohibitions of ESA section 9 to all ...

On May 15, 2023, the U.S. Fish and Wildlife Service (Service) issued two mitigation policies: one titled “Mitigation Policy” and another titled “Endangered Species Act Compensatory Mitigation Policy.” The Mitigation Policy provides a framework to inform Service mitigation procedure and policy, while the Endangered Species Act (ESA) Compensatory Mitigation Policy provides guidance on implementation of the ESA through compensatory mitigation mechanisms. The Service states that both policies are intended as guidelines for Service personnel to follow when ...

On May 17, 2023, the U.S. Court of Appeals for the Ninth Circuit (Ninth Circuit) issued its decision in Center for Biological Diversity v. U.S. Fish and Wildlife Service (Case No. 20-15654), a case in which a mining company challenged the U.S. Fish and Wildlife Service’s (Service) designation of certain areas in southern Arizona as critical habitat for the jaguar (Panthera onca) under the Endangered Species Act (ESA). The Ninth Circuit upheld the district court’s ruling that the Service improperly designated the challenged area as occupied critical habitat. With respect to the ...

This month, the United States Fish and Wildlife Service (Service) published the latest update to its National Listing Workplan (Workplan). This update to the Workplan is the Service’s latest since March 2022 and projects the anticipated timeline for the agency’s listing-related decisions over the next five years (2023-2027). In general, the Workplan estimates the Service’s publication dates for various findings and publications, including but not limited to 12-month findings, species status reviews, proposed listing determinations and critical habitat ...

On April 13, 2023, the United States Fish and Wildlife Service (“Service”) published a proposed rule to revise the critical habitat designation for the rufa red knot (Calidris canutus rufa). The red knot is a shorebird that migrates annually between the Canadian Arctic and wintering regions to the south, including the Southeast United States, the Northeast Gulf of Mexico, northern Brazil, and Tierra del Fuego at the southern tip of South America. During both northbound (spring) and southbound (fall) migrations, red knots use key staging and stopover areas to rest and feed.  

The ...

On April 11, 2023, the U.S. Fish and Wildlife Service (Service) issued a final rule listing the bracted twistflower (Streptanthus bracteatus), a wildflower native to Texas, as threatened with a rule issued under section 4(d) of the Endangered Species Act (ESA). The Service also finalized a critical habitat designation for the species spanning approximately 1,596 acres in the Texas counties of Uvalde, Medina, Bexar, and Travis. The critical habitat designation consists of almost entirely public land, with the exception of approximately 63 acres of privately owned land (however ...

On April 3, the U.S. Fish and Wildlife Service (Service) rejected a petition filed by a group of environmental organizations under section 4(e) of the Endangered Species Act (ESA) to list the coyote (Canis latrans) as an endangered species due to its similarity of appearance to the endangered Mexican wolf (C. lupus baileyi). Section 4(e) of the ESA gives the Service the ability to list a species on the basis that its “similarity of appearance” to an endangered or threatened species imperils the protected species’ survival and recovery.

In the petition, the environmental ...

Last week, the U.S. District Court for the District of Columbia issued a ruling allowing the Center for Biological Diversity (CBD) to continue pursuing its large Endangered Species Act (ESA) lawsuit against the U.S. Fish and Wildlife Service (Service) and the Department of the Interior.

The underlying lawsuit, filed in 2019, alleges that the Service violated the ESA by failing to timely publish 12-month findings on nearly 200 listing petitions, final listing determinations for six species, and designations of critical habitat for four species.  In response, the Service filed a ...

On March 9, the U.S. Fish and Wildlife Service (Service) issued its 12-month finding that listing Joshua trees (Yucca brevifolia and Y. jaegeriana) as endangered or threatened species under the Endangered Species Act (ESA) is not warranted. The 12-month finding was made to comply with a September 20, 2021 court-ordered remand of the Service’s previous “not warranted” finding in August 2019.

In September 2015, WildEarth Guardians submitted a petition to list the Joshua trees as threatened and, if applicable, designate critical habitat for the species. The Service issued ...

On February 28, 2023, I published a post on the Center for California Water Resources Policy and Management’s DeltaCurrents blog discussing Species Status Assessments (SSAs) as a tool to facilitate implementation of the federal Endangered Species Act (ESA). The U.S. Fish and Wildlife Service (Service) describes the SSA framework as “an analytical approach developed . . . to deliver foundational science for informing all [ESA] decisions.” The Service has explained it intends SSAs to provide “focused, repeatable, and rigorous scientific assessment” that results in ...

On February 6, the U.S. District Court for the Northern District of California sided with the Bureau of Reclamation (Reclamation) and plaintiffs Institute for Fisheries Resources, Pacific Coast Federation of Fishermen’s Associations, and the Yurok Tribe, in holding that an order governing Reclamation’s operation of Upper Klamath Lake (UKL) from the Oregon Water Resources Department (OWRD) is preempted by the Endangered Species Act (ESA). The order, issued in the midst of a recent drought to meet the needs of irrigators, mandated Reclamation to “immediately preclude or ...

On February 9, 2023, the U.S. Fish and Wildlife Service (Service) published proposed revisions to its regulations governing incidental take and enhancement of survival permitting under Endangered Species Act (ESA) section 10.

If finalized, the regulations would do away with the distinction between candidate conservation agreements with assurances and safe harbor agreements, clarify that incidental take permits no longer need to have a federally listed species as the “lead” species, codify aspects of the agency’s five-point policy that provide detail on the necessary ...

This January, the Department of the Interior and the Department of Commerce announced updated civil monetary penalties for violations of federal wildlife and natural resource protection laws including the Endangered Species Act (ESA), Marine Mammal Protection Act (MMPA), Bald and Golden Eagle Protection Act (BGEPA), Magnuson-Stevens Fishery Conservation and Management Act (Magnuson-Stevens), Lacey Act, National Marine Sanctuaries Act (NMSA), and others.

The Federal Civil Penalties Inflation Adjustment Act Improvements Act of 2015 requires federal agencies to adjust ...

Earlier this month, the U.S. Court of Appeals for the Ninth Circuit issued a ruling holding that the United States Fish and Wildlife Service’s (Service) decision not to modify a recovery plan for the grizzly bear (ursus arctos horrbilis) was not a final agency action subject to review under the Administrative Procedure Act (APA).

In 1975, the Service listed the grizzly bear as a threatened species under the Endangered Species Act (ESA).  At the time of listing, the grizzly bear’s population in the contiguous United States fell to between 700-800 individuals.  Pursuant to its ...

On January 24, 2023, the U.S. Fish and Wildlife Service (Service) proposed to designate approximately 104 river miles as critical habitat for the sickle darter (Percina williamsi) under the Endangered Species Act (ESA). The critical habitat designation would be divided into six areas—Little River, Emory River and Rock Creek, Copper Creek, North Fork Holston River, Middle Fork Holston River, and Sequatchie River—which together span Bledsoe, Blount, Morgan, and Roane Counties in Tennessee, and Scott, Smyth, and Washington Counties in Virginia. Nearly 80 percent of the ...

On November 30, 2022, the U.S. Fish and Wildlife Service (Service) issued a final rule listing the northern long-eared bat (NLEB) (Myotis septentrionalis) as an endangered species under Section 4 of the Endangered Species Act (ESA), reclassifying it from its former threatened status and rescinding its section 4(d) rule. In determining whether to list the NLEB, the Service looked to factor C of ESA section 4, which requires the Service to make a listing determination if “disease or predation” poses a threat to the species. The Service cited the impacts of white nose syndrome (WNS ...