The smallest gray wolf subspecies in North America, the Mexican gray wolf is also one of the rarest and most imperiled mammals on the continent. The U.S. Fish and Wildlife Service (and its predecessor ...

Reaching up to 800 pounds and 8 feet tall when standing, grizzly bears boast tremendous size and physical strength and have almost no natural enemies. Or just one — humans. But we’ve proved formidable ...

The giant garter snake is one of North America's largest native snakes, reaching up to 64 inches in length and endemic to California's Central Valley, where it originally inhabited natural wetlands.

For every county in the United States, the map below shows information on all the animals and plants protected under the U.S. Endangered Species Act as threatened or endangered. To see the number of ...

An analysis of oil and gas pipeline safety in the United States reveals a troubling history of spills, contamination, injuries and deaths. This time-lapse video shows pipeline incidents from 1986 to ...

The word jaguar comes from the South American Tupi and Guarani languages. A likely origin is the word yaguareté, meaning “true, fierce beast.” DESCRIPTION: The largest cat native to North America and ...

Like the polar bear on the opposite pole, the emperor penguin endures almost unfathomable hardships to breed and nurture each new generation — fasting for months through the planet's harshest winter ...

Synthetic phosphate fertilizer poses a serious threat to our environment. Phosphate rock mining, along with the inorganic fertilizers and animal feed supplements and pesticides for which phosphate is ...

“But doesn’t Ted Turner have a lot of them?” a salesperson once asked me. She’d noticed an embroidered bison on my hat. Her comment typified the very limited knowledge that most Americans have about ...

DESCRIPTION: Roughly five feet in length, Mexican gray wolves generally weigh between 50 and 80 pounds. Their coats are buff, gray, and rust colored, often with distinguishing facial patterns. They ...

The Center’s Population and Sustainability program addresses the impacts on wildlife and the environment that are caused by human population pressure and destructive consumption and production. We ...

Having collected the most recent census data from state and federal bald-eagle managers in each of the lower 48 states and the District of Columbia, the Center for Biological Diversity has determined ...