Endangered Species Management: ESA Framework, Rollback, and Reform

The Endangered Species Act is the 1973 federal law that identifies plants and animals at risk of extinction and forces federal agencies, states, tribes, and private landowners to avoid killing them or destroying the habitat they depend on. It has been credited with preventing the extinction of roughly 99% of the species it protects, and it is currently in the middle of its most contested period in decades: a Trump administration rulemaking rolling back Biden-era regulations, a House bill rewriting core definitions, the first “God Squad” exemption in more than 30 years, and a federal court ruling in March 2026 that vacated four consultation regulations.

What the Law Actually Does

Signed into law on December 28, 1973, the Endangered Species Act (16 U.S.C. 1531–1544) sets up a system for identifying species nearing extinction and putting recovery in motion. Listing and management decisions are supposed to rest on the “best available science” rather than political or economic considerations alone.¹ The Act is also the domestic vehicle for U.S. participation in the Convention on International Trade in Endangered Species of Wild Flora and Fauna (CITES).

Four operative sections do most of the work:

Section 4 governs adding species to and removing them from the endangered and threatened lists, and requires recovery plans.
Section 7 requires federal agencies to consult with wildlife experts before doing anything that could harm a listed species or its habitat.
Section 9 flatly prohibits the “take” of a listed species, which the Act defines to include harassing, harming, pursuing, wounding, or killing it.
Section 10 provides a permit process that allows otherwise prohibited activities under controlled conditions.¹

Who Administers It

Two federal agencies share the job. The U.S. Fish and Wildlife Service, in the Department of the Interior, handles terrestrial and freshwater species along with certain marine mammals such as polar bears, sea otters, walruses, and manatees. NOAA Fisheries, part of the Department of Commerce, manages most marine and anadromous species, including whales, seals, sharks, corals, and salmon.² They share jurisdiction over a handful of species that cross habitat boundaries, including sea turtles, Gulf sturgeon, and Atlantic salmon.³

Both agencies list and delist species, designate critical habitat, consult on federal projects, issue permits, hand out conservation grants to states and tribes, and conduct periodic status reviews.³

How a Species Gets Listed

Anyone can petition either agency to list a species. Within 90 days, the agency must publish a Federal Register finding on whether the petition presents “substantial information” that listing may be warranted. If it does, a deeper review follows with a public comment period. A 12-month finding then decides whether to move ahead with a proposed rule.⁴ After further public comment and independent peer review, a final rule typically issues within one year of the proposed rule.

Critical habitat is usually designated at the same time as the final listing rule. The agency identifies habitat that the species occupied at the time of listing and that contains features essential to conservation, and it may also designate unoccupied areas that are essential. Designation must weigh economic, national security, and other relevant impacts. Areas under Department of Defense control may be exempt where an existing management plan already benefits the species, and no critical habitat can be designated in foreign countries.⁴

Section 7: What Federal Agencies Have to Do

Section 7 is the mechanism that keeps federal agencies from inadvertently destroying what the Act is trying to save. Whenever a federal agency plans an action that may affect a listed species or its critical habitat, it has to consult with the Fish and Wildlife Service or NOAA Fisheries to make sure the action will not jeopardize the species’ survival or destroy critical habitat.⁵

There are two tracks. Informal consultation is the lighter path: if the acting agency concludes, and the expert agency agrees in writing, that the project is “not likely to adversely affect” a listed species, the process ends. When the effect is “likely to adversely affect,” formal consultation begins. The expert agency has 90 days, plus 45 days to prepare the document, to produce a Biological Opinion analyzing whether the action would cause jeopardy or adverse modification of critical habitat.⁵

A jeopardy finding must identify Reasonable and Prudent Alternatives that would allow the project to proceed with modifications. If the opinion expects incidental take even with protections in place, it includes an Incidental Take Statement that exempts that limited harm from Section 9’s prohibition, provided the agency follows specific conditions. A federal agency that receives a jeopardy finding has three options: terminate the action, adopt the alternatives, or seek an exemption from the Endangered Species Committee, the rarely convened body known as the “God Squad.”⁶

In practice the process rarely stops projects. An analysis of more than 88,000 Section 7 consultations between 2008 and 2015 found no projects were halted or extensively altered because of jeopardy findings. Median informal consultation took 13 days; formal consultations averaged 62 days.⁷

Section 10: What Private Landowners and Developers Can Do

Section 10 is the path for everyone who isn’t a federal agency. Private landowners, developers, and other non-federal actors whose lawful activities might incidentally harm a listed species can apply for an Incidental Take Permit. The application must include a Habitat Conservation Plan setting out how the applicant will minimize and mitigate impacts “to the maximum extent practicable.”⁸

The “No Surprises” rule, established in 1998, guarantees permit holders that if they properly implement their conservation plan, the government will not demand additional mitigation measures or financial commitments if unforeseen circumstances arise.⁹

In April 2024, the Fish and Wildlife Service simplified the voluntary conservation side of Section 10 by merging Safe Harbor Agreements and Candidate Conservation Agreements with Assurances into a single category called Conservation Benefit Agreements. These give non-federal landowners regulatory assurances when they voluntarily undertake conservation activities, promising that the government will not impose additional restrictions even if species populations increase or new species are listed.⁸

Recovery, Delisting, and the Track Record

Recovery plans are the roadmaps for bringing species back. Each plan has to include site-specific management actions, objective and measurable recovery criteria that would justify delisting, and estimates of the time and money needed.¹⁰ The plans are guidance documents, not binding regulations, but they are developed with extensive collaboration among federal, state, tribal, and nongovernmental partners and go through public comment before they are finalized.

When a species meets its recovery criteria, it can be delisted. Both agencies also conduct five-year reviews to check whether species are still appropriately listed. As of mid-2026, the Fish and Wildlife Service’s ECOS database lists 138 total delisted entries, covering species removed because of recovery, extinction, or reclassification based on new information. The wood stork was delisted in March 2026. The most recent extinctions came in November 2023, when seven species, mostly Hawaiian birds, were removed because they had been lost.¹¹

A 2019 peer-reviewed study found that four species have been confirmed extinct after receiving ESA protection, while 39 had been fully recovered and delisted. The authors estimated the Act has prevented the extinction of roughly 291 species since 1973.¹² Critics point to the small number of fully recovered species as evidence the law has fallen short. Supporters respond that its statutory purpose is preventing extinction, not achieving rapid recovery, and that many listed species have simply not been protected long enough, or funded well enough, to have recovered yet.⁷

Penalties for Violations

The ESA carries real consequences. Civil penalties for knowingly violating Section 9’s take prohibition can reach $25,000 per violation. Criminal violations can result in fines up to $50,000, imprisonment for up to one year, or both. Equipment involved in criminal violations is subject to forfeiture, and a conviction can lead to suspension or revocation of federal leases, licenses, and permits. The Department of Justice’s Environment and Natural Resources Division leads federal enforcement and often pairs ESA charges with the Lacey Act, which targets illegal wildlife trade and carries penalties up to five years in prison and $250,000 in fines for individuals.¹³ The Act also authorizes citizen suits, letting private parties sue alleged violators or force the government to perform its duties under the law.

The Court Decisions That Shape How It Works

TVA v. Hill (1978)

The case that established the ESA’s extraordinary legal weight involved a three-inch fish called the snail darter and the nearly finished Tellico Dam. The Tennessee Valley Authority project was about 80% complete with over $78 million spent, and completion would have inundated the snail darter’s only known habitat. The Supreme Court ruled that the ESA contained no exception for nearly finished projects and that Congress had intended to halt species extinction “whatever the cost.”¹⁴

Congress responded by creating the Endangered Species Committee, or “God Squad,” a high-level body that can grant exemptions in rare cases. The committee actually denied the Tellico exemption in early 1979, but Tennessee lawmakers attached a rider to an appropriations bill exempting the project from the ESA outright, and the dam was completed.¹⁵ The snail darter was later reclassified from endangered to threatened after additional populations were found.

Babbitt v. Sweet Home (1995)

In a 6–3 decision the Court upheld the Interior Department’s regulation defining “harm” under the ESA’s take prohibition to include significant habitat modification or degradation that actually kills or injures wildlife. Justice Stevens, writing for the majority, reasoned that the ordinary meaning of “harm” naturally covers indirect injury through habitat destruction, and that if Section 9 only prohibited direct force against an animal, the incidental take permit provision of Section 10 would be unnecessary.¹⁶ The decision remains the foundation for treating habitat destruction as a form of prohibited take.

Weyerhaeuser v. U.S. Fish and Wildlife Service (2018)

A unanimous Court ruled that an area must qualify as “habitat” for a species before it can be designated as “critical habitat” under the ESA. The case concerned 1,544 acres of private timberland in Louisiana designated as critical habitat for the endangered dusky gopher frog, even though the frog did not currently live there and the site would have needed significant modification to support it. The designation carried an estimated cost to the landowners of up to $33.9 million.¹⁷ The Court also held that an agency’s decision not to exclude an area from critical habitat based on economic impacts is subject to judicial review.¹⁸

Loper Bright Enterprises v. Raimondo (2024)

Not an ESA case on its facts, but consequential all the same. The Court overruled the 40-year-old Chevron doctrine, holding that courts must exercise their own independent judgment when deciding whether an agency has acted within its statutory authority, rather than deferring to an agency’s interpretation of an ambiguous statute.¹⁹ Both the Fish and Wildlife Service and NOAA Fisheries have cited Loper Bright as a reason for their current ESA regulatory revisions, arguing that some interpretations adopted under prior administrations went beyond what the statutory text actually permits.

The Current Regulatory Rollback

In November 2025, the Fish and Wildlife Service and NOAA Fisheries proposed four rules to revert ESA implementing regulations to the framework established during the first Trump administration, replacing regulations finalized under the Biden administration in 2024.²⁰ The agencies cited Loper Bright and executive orders directing review of regulations that could burden domestic energy development.

The proposals reach nearly every part of ESA implementation:

Listing and critical habitat rules would reinstate the 2019 regulatory text, restoring a two-step process that prioritizes occupied areas before designating unoccupied habitat, clarifying the definition of “foreseeable future,” and removing language that had prohibited consideration of economic impacts in listing decisions.²¹
The Fish and Wildlife Service proposed eliminating the “blanket rule” that automatically extended endangered-species protections to threatened species, requiring instead a species-specific determination for each threatened species.²¹
Section 7 revisions would narrow the definition of “effects of the action,” limit reasonable and prudent measures to avoidance and minimization within the action area (removing the ability to require compensatory offsets), and reinstate 2019 definitions of “environmental baseline.”²⁰
Critical habitat exclusion rules would reinstate the 2020 framework for weighing economic, national security, and other impacts when deciding whether to exclude areas from designation.²²

The agencies described the package as aligning ESA implementation with the “original intent of the statutory text.” Environmental groups have argued the revisions would weaken protections for vulnerable species.

The ESA Amendments Act of 2025

Congress is running a parallel track. H.R. 1897, the Endangered Species Act Amendments Act of 2025, was recommended for approval by the House Committee on Natural Resources in March 2026, and the House adopted a rule for floor consideration by a vote of 211–206 on April 22, 2026.²³

The bill would write statutory definitions for contested terms including “habitat,” “foreseeable future,” and “environmental baseline”; exempt Section 10 incidental take permits from both the National Environmental Policy Act and Section 7 consultation requirements; bar the agencies from requiring additional mitigation or offsets in Habitat Conservation Plans or consultations; and cap attorney fees for frequent ESA litigants.²⁴ It would also set performance metrics for measuring conservation outcomes and add incentives for species recovery on private land.

The Gulf God Squad Exemption

The Endangered Species Committee convened for the first time in more than 30 years and voted on March 31, 2026, to grant a national security exemption allowing all federal oil and gas activities in the Gulf of Mexico to bypass ESA protections. Defense Secretary Pete Hegseth invoked a 1978 provision of the Act to initiate the process.²⁵

The exemption was unprecedented on several fronts: the first time the committee considered a national security request, the first time an exemption was granted for an entire industry rather than a specific project, and the first to sweep in multiple species at once. More than two dozen marine and coastal species are affected, including the critically endangered Rice’s whale, whose population is estimated at roughly 51 individuals, along with five species of sea turtles, endangered sperm whales, manatees, Gulf sturgeon, and the piping plover. NOAA had previously concluded that Gulf oil and gas activities jeopardize the Rice’s whale and estimated that without mitigation, industry operations could kill more than 30,000 sea turtles over 45 years.²⁵

Environmental groups including Healthy Gulf, Turtle Island Restoration Network, Friends of the Earth, the Sierra Club, and the NRDC filed federal lawsuits on April 2, 2026. They alleged the administration abused the national security exception, bypassed required public participation, and failed to show genuine need or urgency. Industry participants had recently told a federal court that existing species protections were not disrupting their operations.²⁶

The March 2026 Ruling That Cut the Other Way

On March 30, 2026, the U.S. District Court for the Northern District of California vacated four amendments to the ESA’s Section 7 consultation regulations, finding they “contradict the text of the Endangered Species Act and undercut the efficacy of Section 7 consultation.” The vacated provisions included a narrowed definition of “effects of the action,” a rule allowing agencies to rely on nonbinding mitigation measures, a restrictive definition of “destruction or adverse modification” of critical habitat, and a change that removed the wildlife agencies’ authority to request reinitiation of consultation.²⁷

The ruling requires the agencies to revert to pre-2019 consultation rules until new final regulations are adopted. Because the November 2025 proposed rules include versions similar to the vacated provisions, the decision complicates the ongoing rulemaking. The court noted that reverting to the prior framework was “unlikely to be disruptive” because the agencies are already familiar with it.²⁷

The Funding Problem

Money is the persistent structural constraint on ESA implementation. The United States spends roughly $1.2 billion annually on endangered and threatened species, but the distribution is dramatically uneven. About half of the total goes to the recovery of two groups: West Coast salmon and steelhead trout. In 2020, fish received 67% of total spending. Plants, which make up more than half of all protected species, received about 2%. Over 200 listed species received no funding at all that year.²⁸

An analysis of recovery plans estimated that fully implementing them for every listed species would require about $2.3 billion per year. The Fish and Wildlife Service’s dedicated recovery budget stood at $82 million in 2016, down 10% from its 2010 peak.²⁹ In fiscal year 2024, Congress appropriated $288.3 million for the broader Ecological Services program at USFWS, which covers more than just species recovery, while the Cooperative Endangered Species Conservation Fund received $23 million for grants to states.³⁰ From 1980 to 2014, most listed species with recovery plans received less than 90% of the funding those plans called for, and a quarter of protected species received less than $10,000 in recovery funding in 2014.

The State Layer

Forty-seven states and Puerto Rico have their own endangered species laws, which supplement the federal ESA by adding resources for federally listed species and by managing state-listed species that have not yet warranted federal protection.³¹ Coverage varies: only 18 states and Puerto Rico protect all plant and animal species.

Under Section 6 of the ESA, the federal agencies can enter cooperative agreements with states that maintain adequate conservation programs, making those states eligible for federal funding to monitor candidate species, conserve listed species, and monitor delisted ones. States can also petition the agencies to list, delist, or reclassify species, and they must receive at least 90 days’ notice and opportunity to comment on any proposed listing that affects them. After a species is delisted, the state resumes primary management, with the federal agency required to cooperate on monitoring for at least five years. State laws cannot be less protective than the ESA, but they can be more restrictive; under Section 6(f), state laws regarding commerce in listed species are preempted if they permit what the ESA prohibits or prohibit what the ESA authorizes.³²

1
U.S. Fish and Wildlife Service. Endangered Species Act
2
NOAA Fisheries. Endangered Species Conservation
3
NOAA Fisheries. Endangered Species Act
4
NOAA Fisheries. Critical Habitat
5
U.S. Fish and Wildlife Service. Endangered Species Consultation Fact Sheet
6
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7
Center for American Progress. Under Threat
8
Federal Register. ESA Section 10(a) Program Implementation
9
NOAA Fisheries. Permits for Incidental Taking of Endangered and Threatened Species
10
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11
U.S. Fish and Wildlife Service. Species Delisted Under the Endangered Species Act
12
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13
U.S. Fish and Wildlife Service. Endangered Species Act Section 11
14
Justia. Tennessee Valley Authority v. Hill, 437 U.S. 153
15
Forest History Society. 1979 Snail Darter Exemption Case
16
Justia. Babbitt v. Sweet Home Chapter of Communities for a Great Oregon, 515 U.S. 687
17
Justia. Weyerhaeuser Co. v. United States Fish and Wildlife Service
18
Harvard Law Review. Endangered Species Act Critical Habitat Designation After Weyerhaeuser
19
Supreme Court of the United States. Loper Bright Enterprises v. Raimondo, 603 U.S. 369
20
U.S. Department of the Interior. Administration Revises Endangered Species Act Regulations
21
U.S. Fish and Wildlife Service. FAQ on Proposed ESA Regulation Revisions
22
Federal Register. Proposed Rule on Designating Critical Habitat
23
U.S. House of Representatives, Rules Committee. H.R. 1897
24
House Committee on Natural Resources. The Endangered Species Act Amendments Act of 2025
25
NRDC. Trump Administration Uses God Squad to Allow Gulf Oil and Gas Industry to Bypass Endangered Species Protections
26
Earthjustice. Gulf Environmental Groups Sue Trump Administration Over Decision to Exempt All Gulf Oil and Gas Activities From Endangered Species Act
27
E&E News. Judge Nixes Trump Changes to Endangered Species Act Regs
28
Orlando Sentinel. Most Money for Endangered Species Goes to a Small Number of Creatures
29
Center for Biological Diversity. Shortchanged: Funding Gaps for Recovering America’s Endangered Species
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Congressional Research Service. U.S. Fish and Wildlife Service Funding
31
National Caucus of Environmental Legislators. Strengthening State Endangered Species Acts to Conserve Biodiversity
32
Congressional Research Service. ESA and the States