Monday morning outside the U.S. District Court in San Francisco, a coalition of tribal nations and environmental organizations filed a lawsuit challenging the Trump administration’s new rule that sharply reduces habitat protections under the Endangered Species Act (ESA). The rule, enacted earlier this summer, has eliminated federal safeguards for millions of acres previously designated as critical habitat for over 150 imperiled species, according to court filings.

Plaintiffs—including the Yurok Tribe and Earthjustice—argue that the rule undermines decades of conservation progress and exposes threatened wildlife to increased risks from real estate and industrial development. Legal experts at the Environmental Law Institute describe this as the most significant revision to the ESA since its inception in 1973, with a near-immediate impact on land use planning across key corridors in the American West and Southeast.

The Fish and Wildlife Service, responsible for enforcing the ESA, contends the rule is intended to streamline permitting for infrastructure and energy projects. However, conservation biologists warn that the policy shift could accelerate habitat loss for species such as the California red-legged frog and the northern long-eared bat, both of which have lost more than 40% of their habitat in the last decade.

While the Biden administration has voiced support for reviewing the rule, no formal reversal has been issued as of July 2026. The court is expected to hold preliminary hearings later this month, with a decision on a temporary injunction anticipated before the congressional summer recess. Meanwhile, the rule’s implementation is being closely watched by state wildlife agencies, developers, and international biodiversity observers, who are tracking potential effects on SDG 15 (Life on Land) targets for 2026.