Endangered Species

Endangered Species

Endangered Species

Protecting endangered species and their habitat is part of the foundational work that the Sierra Club was built around – and it’s working. Today there are more gray wolves, grizzly bears, and California condors than there were a generation ago thanks to Sierra Club members and supporters.



What is the Endangered Species Act?

The Endangered Species Act is one of the most important and effective conservation laws in history. The bipartisan bill passed Congress with almost unanimous support on December 28, 1973, preventing the extinction of roughly 291 species since its passage. Today, more than 80% of the public supports it.

The Endangered Species Act has helped save 99% of species listed for protection from extinction, including the humpback whale, grizzly bear, and bald eagle. Because of its success, gray whales still swim our coasts, peregrine falcons still soar our skies, and polar bears still roam the Arctic tundra. The Act is currently helping protect more than 2,000 species of plants and animals that are threatened or endangered.

The Endangered Species Act is considered one of the greatest success stories of the environmental movement and serves as a model for conservation efforts around the world.

What We Are Doing

Sierra Club is working hard to fight back against attacks to the Endangered Species Act from the Trump Administration and Republicans in Congress. Our chapters and volunteers are also pressuring local decisionmakers to save endangered species, restore keystone species to historic habitats, and protect and connect important habitats so that imperiled wildlife can thrive in the face of climate change and other human-caused threats.

We are leveraging our grassroots power to protect regional species like Florida panthers and grizzly bears in the Northern Rockies. We are also working with Indigenous partners to ensure that Native communities have the resources available to them to manage wildlife on their lands and to restore culturally important species like bison and salmon. In recent years, we have also worked to educate policymakers and the public on how the extinction and climate crises, and the solutions to these crises, are interconnected.

What You Can Do

Victory!

We recently saw a big win for gray wolves in the Northern Rockies. Thanks to legal action by the Sierra Club and partners, Northern Rockies wolves are one step closer to Endangered Species Act protections after a federal judge found the Trump administration's denial unlawful.

September 17, 2026

WASHINGTON, D.C. — An internal U.S. Fish and Wildlife Service memo uncovered by The New York Times reveals that the Trump administration is moving to drastically narrow one of the Endangered Species Act’s most fundamental protections.

September 14, 2026

WASHINGTON, D.C. — A Trump administration rule attempting to rescind the federal regulatory definition of “harm” under the Endangered Species Act goes into effect today. The change removes language that made clear that damaging or destroying…

September 4, 2026

WASHINGTON, D.C. — Donald Trump signed an executive order directing the Department of the Interior to consider removing or reducing Endangered Species Act protections for gray wolves and Mexican wolves.

July 21, 2026

WASHINGTON, D.C. — Conservation groups notified the Trump administration of their plans to challenge two rulemakings weakening the Endangered Species Act (ESA) that were finalized today.

July 20, 2026

WASHINGTON, D.C. — The Trump administration is finalizing two new regulations that will undermine the implementation of federal protections for wildlife under the Endangered Species Act (ESA), the nation’s cornerstone conservation law. One…