WASHINGTON — Snow cover in the Sierra Nevada is expected to shrink overall as the climate warms, but avalanche frequency could remain the same or even increase at high elevations. That’s bad news for ...

The charismatic, robust and impressive North American mountain sheep is losing its habitat to industrial mining, the changing climate and human activity. And unless action is taken to protect this ...

A symbol of the persistent spirit of life in the American West, bighorn sheep have long made their home in the country’s driest desert. Far before white settlers reached Las Vegas, these hearty ...

A desert bighorn sheep and a golden eagle were caught on camera squaring up for a confrontation in the Mojave Desert. The picture, snapped in the Desert National Wildlife Refuge in Nevada by one of ...