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 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 ...

Atrazine is one of the most commonly used herbicides in the United States: Approximately 80 million pounds of it are used across the country each year. It's a common contaminant of ground, surface and ...

The Sonoyta mud turtle has evolved as an aquatic species in one of the driest parts of the Sonoran Desert. With webbed feet and an innate ability to swim, this turtle depends heavily on what little ...

The country has learned a lot since Rachel Carson's 1962 book Silent Spring alerted us to the hazards of poisonous chemicals. But pesticide use still poses major threats to imperiled wildlife and ...

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 ...

DESCRIPTION: The Andean flamingo is both the most rare and tallest of all six species of flamingo. It has a traditional pink coloration throughout its body, with a pale yellow face and black tail ...

DESCRIPTION: This lizard is small — roughly 3.4 inches from snout to vent — and very flat and wide with a long, broad tail and a dark stripe running down the middle of the back. Six long, horn-like ...

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 ...

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 ...

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, ...

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 ...