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The Mexican gray wolf is the most genetically distinct lineage of wolves in the Western Hemisphere and one of the most endangered mammals in North America. (Photo courtesy of Troy B. Thompson)
Press Release January 21, 2026

Earthjustice Strongly Opposed to Rep. Gosar Legislation to Delist Mexican Gray Wolf

Markup scheduled for Thursday on legislation to prematurely strip Endangered Species Act protections
document January 21, 2026

Mexican Gray Wolf: Sign-on Letter

The House Natural Resources Committee scheduled a markup on legislation to prematurely remove Endangered Species Act protections for the Mexican gray wolf – one of the most endangered mammals in…
document July 12, 2022

Mexican Wolf Management Rule Complaint

The Center for Biological Diversity and Defenders of Wildlife, represented by Earthjustice in the suit, argue that Fish and Wildlife Service’s new rule fails to respond to ongoing genetic threats…
Press Release July 12, 2022

Conservation Groups Sue Fish and Wildlife Service Over Inadequate Mexican Gray Wolf Recovery Efforts

New management rule sets target of 320 wolves in a single area of eastern Arizona and western New Mexico
A Mexican gray wolf. (Nagel Photography / Shutterstock)
Press Release: Victory October 15, 2021

Court Ruling: Federal Government Must Address Poaching in Mexican Gray Wolf Recovery Plan

Decision forces U.S. Fish and Wildlife Service to fix flawed recovery plan
A Mexican gray wolf stands in the snow. (gnagel / Getty Images)
Update: Victory October 15, 2021

Court Victory Renews Hope for Survival of Lobos

Our legal win forces the US Fish and Wildlife Service to develop a real plan to stop human killing of Mexican gray wolves.
document October 14, 2021

OPINION: Court Rules Federal Officials Must Address Poaching of Mexican Wolves in New Recovery Plan

Decision forces U.S. Fish and Wildlife Service to fix flawed Mexican Gray Wolf Recovery Plan.
document July 20, 2018

Mexican Gray Wolves 10(j) Rule: Motion for Interim Injunctive Relief

Request asks judge to respond to extreme genetic threat to wild population of Mexican gray wolves.
document July 20, 2018

Mexican Gray Wolves 10(j) Rule: Declaration of Philip W. Hedrick, Ph.D.

Declaration Philip W. Hedrick, Ph.D., Professor Emeritus in the School of Life Sciences at Arizona State University
document July 20, 2018

Mexican Gray Wolves 10(j) Rule: Declaration of Carlos Carroll, Ph.D.

Declaration of Carlos Carroll, Ph.D., research ecologist with the Klamath Center for Conservation Research, and Conservation Science Advisor to the Wilburforce Foundation
F1143, a Mexican gray wolf. The howl of the Mexican gray wolf (Canis lupus baileyi) — the “lobo” of Southwestern lore — is an iconic symbol of the West. (Wolf Conservation Center)
feature April 2, 2018

The Lobo Wolf’s Lament

Meet the Mexican gray wolf, one of the most endangered mammals in North America. Experts believe the genetically weak population could rebound if more wolves are released into the wild.…
document April 2, 2018

Mexican gray wolf 10(j) rule Order

In lead case No. CV-15-00019-TUC-JGZ, Plaintiff CBD’s Motion for Summary Judgment (doc. 114) is GRANTED IN PART and DENIED IN PART to the extent provided herein. Federal Defendants’ Cross-Motion for…
F1143, a Mexican gray wolf. The howl of the Mexican gray wolf (Canis lupus baileyi) — the “lobo” of Southwestern lore — is an iconic symbol of the West. (Wolf Conservation Center)
Press Release: Victory April 2, 2018

Court Rejects Flawed Mexican Gray Wolf Rule

Ruling rejects measures that hurt, instead of help, rare wolves
Four decades after listing, the U.S. Fish and Wildlife Service finally have to complete a plan to recover the Mexican gray wolf. Unfortunately it's deeply flawed. (Nagel Photography/Shutterstock)
Press Release January 30, 2018

Demanda desafía erróneo plan para salvar al lobo gris mexicano

El plan ignora la ciencia, falla en acciones de recuperación urgentes
document January 29, 2018

Mexican Gray Wolf Recovery Plan Complaint

A coalition of wolf advocates today filed a lawsuit challenging the Trump administration’s deeply flawed recovery plan for the Mexican gray wolf, one of North America’s most endangered mammals
Four decades after listing, the U.S. Fish and Wildlife Service finally have to complete a plan to recover the Mexican gray wolf. Unfortunately it's deeply flawed. (Nagel Photography/Shutterstock)
Press Release January 29, 2018

Lawsuit Challenges Trump Administration’s Fatally Flawed Mexican Wolf Plan

Plan ignores science, fails on urgently needed recovery actions
Today, there is a single wild population comprising just over 100 individuals, all descendants of just seven wild founders of a captive breeding program. These wolves are threatened by illegal killings, legal removals due to conflicts with livestock, and a lack of genetic diversity. (Photo courtesy of Don Burkett)
Press Release November 29, 2017

New Trump Administration Plan For Mexican Gray Wolves Puts The “Lobo” On Path To Extinction

Plan ignores the science and falls short in several key ways
A pair of Mexican gray wolves (Canis lupus baileyi) look out over a snowy ledge. (Glenn Nagel / Getty Images)
Article November 29, 2017

‘Recovery’ Plan for Mexican Gray Wolf Further Threatens this Endangered Species

A plan by the U.S. Fish and Wildlife Service aims low, involving too small a habitat and too few wolves.