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Clockwise, from top-left: (Jerry Neal / CPW), (SimonSkafar / GettyImages), (Courtney Couch / NOAA), (Zach Stern / CC BY-NC-ND 2.0), (K. King / USFWS), (Zara / 500px), (Lisa Hupp / U.S. Fish and Wildlife Service), (New Zealand Department of Conservation), (jacobeukman / Getty Images), (Troy Harrison / Getty Images)
feature November 3, 2025

Biodiversity Program Report

Earthjustice fights to protect imperiled species and the habitats that support their lives — and ours. Here are highlights of our work to defend our natural world over the past year, and a glimpse at what’s next.

Grizzly bear in Yellowstone National Park, May 19, 2020. (Jim Peaco / NPS)
feature October 9, 2025

Defending the Grizzly Bear

Science shows that true recovery of grizzly bears requires a unified population with connected ecosystems.

First light strikes the summit of Mount Moran, painting the sky orange as a female grizzly wades a shallow bend in the Snake River in Grand Teton National Park, Wyoming. (Photo courtesy of Thomas D. Mangelsen)
feature October 23, 2024

“A Lens Into Their Lives”: The Grizzlies of the Greater Yellowstone Ecosystem

Grizzly 399, an iconic bear matriarch in the Greater Yellowstone region, has died due to a vehicle strike. Earthjustice has worked for decades to safeguard grizzlies from threats to their survival. Today we are mourning Grizzly 399’s loss and reflecting on these observations of her that legendary photographer Thomas D. Mangelsen shared in 2020.

A grizzly bear in a Montana forest. (Beth Hibschman / Getty Images)
Article May 12, 2025

Now Is the Time to Raise Your Voice for Grizzly Protections

Grizzlies face growing threats to their survival in the Northern Rockies. Here’s how we’re helping them come back from the brink.

The Gallatin Range in Southwest Montana. (Jared Lloyd / Getty Images)
feature September 23, 2025

The Intermountain West: Regional Spotlight

Our teams in Bozeman, Montana, and Denver, Colorado, have spent decades fighting to defend the web of life, to protect people’s health, and to advance a just transition to clean energy. We’re pleased to share highlights of our progress, and a glimpse at what’s next.

Remote camera image of a wolf pups taken during the summer of 2025. (Courtesy of Colorado Parks and Wildlife)
Article October 2, 2025

Birth of New Pups Illustrates the Success of Colorado Wolf Reintroduction

The births underscore the importance of reintroduction efforts and strong protections for endangered species.

Doug Peacock stands on the edge of the Yellowstone River in Emigrant, Montana.
(Tom Robertson)
Article July 8, 2020

Grizzlies ‘Saved His Life’ and Now He Fights To Save Theirs

Naturalist and author Doug Peacock talks about why we need to “fight like hell” to save the endangered and iconic Yellowstone grizzlies.

Grizzly bear near Swan Lake in Yellowstone National Park. (Neal Herbert / NPS)
Press Release December 11, 2024

‘Grizzly Bears Not Recovered’ Says Leading Biologist, 15 Regional & National Groups Petition for New Recovery Vision

Former U.S. Fish & Wildlife Grizzly Coordinator updates his own 30-year-old Recovery Plan

Article: Victory November 9, 2021

How a Win for Montana’s Lynx and Grizzlies Also Protects Wolves

We’re also pursuing multiple other cases to protect this keystone species across the contiguous United States.

Doug Peacock is a veteran, writer and naturalist who has worked for five decades to defend grizzly bears and their habitat.
(Courtesy of Doug Peacock)
video August 28, 2018

Grizzlies Saved His Life

When Doug Peacock returned from the Vietnam War, he sought refuge in the American wilderness. Among the great bears, he began to heal. This is his story.

Silver-tipped Grizzly 399, a Yellowstone grizzly bear, surveys a meadow, looking for potential dangers for her three young cubs.
(Thomas D. Mangelsen)
Press Release: Victory July 8, 2020

9th Circuit Upholds Endangered Species Protections for Yellowstone Grizzlies

Court of appeals sends U.S. Fish and Wildlife Service back to the drawing board

A Northern Continental Divide grizzly bear.
(National Park Service)
Update June 1, 2022

Why This Road Fight is Critical for Grizzlies, Bull Trout, and More

The fight against roads in Flathead National Forest reflects a broader battle to protect species biodiversity.

A federal court recently ruled that the killing of four grizzlies in Grand Teton National Park violated the Endangered Species Act, but much work remains to ensure that the grizzly will continue to roam our nation’s wildest lands.
(TheGreenMan/Shutterstock)
Article April 7, 2016

Why the Killing of Four Grizzlies Matters

A federal court recently ruled that the killing of four grizzlies in Grand Teton National Park violated the Endangered Species Act, but there’s much work remaining to ensure that the great grizzly will continue to roam our nation’s wildest lands.

Un oso pardo de Yellowstone merodea un prado para evitar peligros potenciales para sus tres cachorros.
(THOMAS D. MANGELSEN)
Press Release: Victory July 8, 2020

Tribunal Protege a Osos Grizzlies de Yellowstone Mediante Ley de Especies en Peligro de Extinción

El tribunal de apelaciones envía de regreso su fallo al Servicio de Pesca y Vida Silvestre de los Estados Unidos

A grizzly in a Wyoming field. (Scott Suriano / Getty Images)
Press Release: Victory February 5, 2025

Judge Upholds Ruling Limiting Wolf Trapping, Snaring in Idaho

Upon reconsideration, judge rejects Idaho’s rare request to reverse decision

Press Release December 6, 2021

Lawsuit Challenges Idaho Wolf Trapping Laws That Endanger Grizzlies, Lynx

Idaho’s expanded wolf trapping likely to kill 90% of state’s gray wolf population

Grizzly 610 walks down a park road with her three cubs in springtime, April 13, 2012.
(Photo courtesy of Thomas D. Mangelsen)
Press Release May 25, 2018

Earthjustice Responds to Wyoming’s Vote to Open Hunt of Yellowstone Grizzlies

Court decision pending on removal of protections for iconic and imperiled bears

A juvenile grizzly stands in a summer wildflower field in Yellowstone National Park.
(Photo courtesy of Tom Murphy)
Press Release January 8, 2018

Tribal, Conservation Groups Urge Court to Restore Endangered Species Protections for Yellowstone Grizzlies

Trophy hunting looms, absent federal protections