- The Trump administration finalized new rules last week that significantly change how the Endangered Species Act protects wildlife and their habitats.
- The changes end automatic protections for newly listed “threatened” species and shift how the government weighs economic factors when designating critical habitat.
- Conservation groups have vowed legal challenges, while federal officials say the reforms restore the law’s original purpose and reduce regulatory overreach.
Tuesday, July 21, 2026 — For more than 50 years, the Endangered Species Act has stood as the nation’s bedrock legal shield for plants and animals teetering on the brink of extinction. Last week, the Trump administration reshaped how that law works, finalizing three separate regulatory changes in the span of ten days that together rewrite key rules governing which species get protected, how habitat is safeguarded, and what counts as “harm” to a listed animal or plant.
The moves have drawn sharp praise from the administration and sharp criticism from conservation and wildlife organizations, setting the stage for what many expect will be a new round of legal battles over one of the country’s most consequential environmental laws.
What Changed, and Why It Matters.
Think of the Endangered Species Act as a ladder. At the top rung sits “endangered” status, reserved for species facing the most immediate risk of extinction. One rung down is “threatened” status, for species likely to become endangered in the foreseeable future. Until last week, a rule called the “blanket rule” treated threatened species almost the same as endangered species, automatically giving them a full suite of protections the moment they were listed.
That blanket rule is now gone.
On July 17, 2026, the U.S. Fish and Wildlife Service finalized a rule eliminating that automatic protection
. Going forward, newly listed threatened species will receive protections only through a separate, species-by-species review process. The agency says that approach allows it to tailor protections to fit each species’ actual situation. Critics say it will leave vulnerable animals and plants exposed for years while the government works through the paperwork.
“This decision defies the intent of the Endangered Species Act and common sense,” said Earthjustice attorney Clay Samford. “Rather than automatically protecting threatened species, like Florida manatees, so they don’t slip closer to extinction, the new rule leaves them unprotected while the agency does potentially years more paperwork to decide what protections they should receive.”
The blanket rule that was eliminated had been in place since 1975. Earthjustice noted that species such as the Florida manatee, Pygmy rabbit, Aztec Gilia, and Clover’s Cactus could now be left without automatic protection upon listing.
Critical Habitat: Who Gets a Say?
The second rule finalized on July 17, 2026, changes how the federal government designates “critical habitat,” which is land or water that a species needs to survive and recover.
Under previous rules, government biologists had broad discretion to rely on science when determining which areas qualified as critical habitat. The new rule requires the U.S. Fish and Wildlife Service to give greater weight to economic impacts, national security concerns, and other non-biological factors when deciding which areas to protect. Critically, under the revised rule, an area can now be excluded from a critical habitat designation if that exclusion would not directly cause the extinction of the species.
WildEarth Guardians’ Endangered Species Advocate Joanna Zhang said the rule opens the door to industry influence over conservation decisions. “Under this rule, if the heavily weighted benefits of opening up critical habitat to private interests are deemed to outweigh conservation benefits, the Service will be required to exclude the land from protection, effectively handing industry groups a veto over conservation decisions,” Zhang said. “By bringing back a policy that was already rejected and rescinded in 2022, the Trump administration is prioritizing extractive industry and political interests over the survival of imperiled wildlife.”
Earthjustice senior attorney Elizabeth Forsyth echoed that concern. “The Trump administration is turning the law on its head by letting extractive industries dictate where critical habitat can be destroyed,” Forsyth said. “This prioritization of industry interests over science is fundamentally at odds with the clear purpose of the Endangered Species Act. We won’t let this dangerous giveaway go unchallenged.”
The rule could have wide-ranging consequences for species across the country. Earthjustice identified green sea turtles, Monarch butterflies, polar bears, Canada lynxes, sage-grouse, and Texas hornshells as among the species that could be affected. In Hawaii, the rule could have a particularly sharp impact, given the limited habitat available for native species found nowhere else on Earth, such as the ‘i’iwi bird.
The administration, for its part, described the critical habitat changes as a return to what Congress originally intended. “We are following the original intent of the law, looking at the facts on the ground and listening to local voices when making decisions under the Endangered Species Act,” said Interior Secretary Doug Burgum. “Multi-generational families on America’s working lands care deeply about wildlife, clean air, clean water, and healthy habitat. Along with states, they are the front lines of making recovery possible for endangered species.”
Redefining “Harm”: The July 10 Rule.
The third change came one week earlier. On July 10, 2026, the Department of the Interior and the Department of Commerce jointly finalized a rule rescinding the longstanding regulatory definition of “harm” under the Endangered Species Act.
For decades, “harm” under the law included not just the direct killing or injuring of a protected species, but also significant habitat modification that disrupted an animal’s behavior, breeding, or feeding. That broader definition had been central to many enforcement actions, requiring developers, landowners, and industries to consider how their activities might indirectly affect listed species.
Under the revised rule, that broader interpretation is gone. Going forward, prohibited “take” under the law refers to more direct actions against a listed animal or plant. Actions that directly injure or kill listed wildlife remain prohibited, and existing permits and incidental take permits remain valid.
The administration tied the change to the Supreme Court’s 2024 decision in Loper Bright v. Raimondo, which requires federal agencies to follow the clearest meaning of a statute rather than rely on expansive interpretations. “For years, federal agencies abused the [Endangered Species Act] to obstruct lawful land use and burden American families and businesses,” said Secretary Burgum. “That approach turned routine activity into a regulatory trap, drove up costs that impacted people’s lives, and expanded federal authority beyond what Congress intended.”
Department of Commerce Secretary Howard Lutnick framed the change in terms of the fishing industry. “President Trump is rescinding overly broad and burdensome regulations that have restrained our fishermen for too long,” Lutnick said. “We’re returning the [Endangered Species Act] to its foundational purpose to ensure legitimate conservation goals are met without sacrificing economic growth and American prosperity.”
U.S. Fish and Wildlife Service Director Brian Nesvik said the administration’s approach balances conservation with community needs. “We can protect species and respect communities at the same time,” Nesvik said.
Conservation Groups Push Back.
Wildlife and conservation organizations say the three rules, taken together, represent the most significant weakening of the Endangered Species Act since the law was signed by President Richard Nixon in 1973.
Ben Greuel, the Sierra Club’s Wildlife Campaign Manager, said the administration has been systematically dismantling the law’s core framework. “The administration’s decisions continue a steady attempt at dismantling the Endangered Species Act’s longstanding protections for America’s wildlife,” Greuel said. “By removing automatic protections for newly threatened species and attempting to compel exclusion of areas from critical habitat designations based on non-biological considerations, the administration is making it harder for imperiled wildlife to survive and recover.”
Sara Amundson, president of Humane World Action Fund, said the elimination of the blanket rule amounts to a failure of federal responsibility. “Rescinding the blanket 4(d) rule will undermine safeguards for threatened species while creating unnecessary hurdles that will slow future protections,” Amundson said. “The process of developing species-specific regulations for every newly listed threatened species is far more time-consuming and resource-intensive, making delays in protecting vulnerable wildlife all but inevitable.”
Kitty Block, president and CEO of Humane World for Animals, warned the changes could push at-risk animals closer to extinction. “For half a century, the Endangered Species Act has prevented the extinction of America’s most vulnerable wildlife, providing essential protections before species reach the point of no return,” Block said. “This decision clearly benefits special interests seeking fewer safeguards, not the wildlife species whose very survival depends on this longstanding, effective law that is supported by millions of Americans.”
The Administration’s Defense.
Federal officials maintained that the reforms bring the law closer to its original purpose and relieve financial burdens on landowners, farmers, ranchers, small businesses, and energy producers who have struggled with unpredictable and costly regulatory processes.
U.S. Fish and Wildlife Service Director Nesvik said the agency will still rely on science. “In the 21st century, the Service will embrace a data-driven approach to tailor regulatory protections for America’s precious natural resources while recognizing the importance of the American people’s ability to prosper in the land of the free,” Nesvik said.
Secretary Burgum pointed to what he called a weak track record under the existing framework. “Nearly 97 percent of species ever placed on the list remain there today,” Burgum said. “Success should be measured by species recovery and delisting, not by adding more species to the list.”
What Comes Next.
The Sierra Club and Earthjustice both signaled they are reviewing the rules and evaluating legal options. Earthjustice noted that a federal court struck down a separate set of regulatory changes targeting the Endangered Species Act in March 2026, a precedent that conservation groups say demonstrates these rules can be successfully challenged in court.
The three regulatory changes, taken together, mark one of the most sweeping revisions to the implementation of the Endangered Species Act since the law was first enacted. Whether those changes survive legal scrutiny remains to be seen.
