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 ...

Did your childhood include swallowtail and monarch butterflies fluttering through your neighborhood? Caterpillars chewing backyard leaves? Warm summer nights with fireflies blinking in the bushes? The ...

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 ...

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 ...

In the southwestern United States and northwestern Mexico lies a region boasting the highest biodiversity in inland North America. Isolated mountain ranges topped by 10,000-foot peaks rise from ...

When a Chiricahua leopard frog wants attention, it snores — at least, its distinctive call sounds like a snore. But the sound of snoring around desert streams, springs and even stock tanks is a lot ...

The largest of the true foxes, red foxes are also the most widespread, found across the entire northern hemisphere. But secretive Sierra Nevada red foxes — genetically and geographically distinct from ...

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 ...

Our planet now faces a global extinction crisis never witnessed by humankind. Scientists predict that more than 1 million species are on track for extinction in the coming decades. But there’s still ...

Hellbenders may not be pretty, but these strictly aquatic salamanders are as interesting as their awesome name implies — and they can grow up to two feet long, which makes them the largest North ...

Remote and roadless Conglomerate Mesa, adjacent to Death Valley National Park, is under threat from mining interests. The Bureau of Land Management is considering a proposal from Mojave Precious ...

The Delmarva Peninsula fox squirrel is the largest variety of tree squirrel in North America — with about half its length taken up by its long, exceedingly fluffy tail. Unlike the chattering, ...