The grizzly bear is so named because its hair is grizzled, or silver tipped, yet the name is commonly believed to be derived from “grisly,” meaning “horrible.” DESCRIPTION: A subspecies of brown bear, ...

DESCRIPTION: Forest elephants are the smaller of the two African elephant species. They also have straighter, thinner tusks, more rounded ears and differently shaped skulls. Both elephant species ...

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 ...

Gulo means “glutton” in Latin. DESCRIPTION: The largest terrestrial member of the weasel, or mustelid, family, the wolverine has an average length of 36 inches and a height of 12 inches. Males weigh ...

Within a typical forest in the eastern United States, salamanders are everywhere. On an acre of forest, thousands of salamanders may be foraging among the leaf litter, under logs, and in creeks ...

The razorback sucker is a large, warm-water fish native to the Colorado River basin. Construction of more than a dozen dams throughout the lower basin has left little natural habitat for the fish and ...

DESCRIPTION: The Riverside fairy shrimp is a small, freshwater crustacean between 13 and 25 millimeters long, with females being slightly smaller than males. The animal's frontal appendage is ...

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 ...

It’s an invisible threat, but noise pollution is a major — and often deadly — menace to ocean wildlife. Just as there’s hardly a mountaintop free from the roar of airplanes overhead, there’s virtually ...

Freshwater mussels are some of the planet's most fascinating and underappreciated animals. With their beautifully colorful shells, diversity of shapes and interesting adornments — including ridges, ...

At the Center for Biological Diversity, we believe that the welfare of human beings is deeply linked to nature — to the existence in our world of a vast diversity of wild animals and plants. Because ...

As ancient as the dinosaurs, the leatherback sea turtle is something of a dinosaur itself — and the heaviest reptile on the planet. This champion swimmer, whose diving capabilities are unmatched by ...