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A survivor of three ice ages, the Sierra Nevada Bighorn Sheep, with populations documented living 300,000 years ago, is now on the endangered species list. These majestic animals struggle on in small ...

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 ...

Despite seeing the number of bighorn sheep substantially decline in recent years, conservationists have reported that their population in the Sierra Nevada mountain range is potentially on the rebound ...

In the rugged deserts of the Las Vegas Valley, a crisis unfolded in early 2025 that threatened the survival of the desert bighorn sheep. A brutal drought, stretching over 200 days without measurable ...

VALLEY OF FIRE — Blindfolded, sedated and dangling 100 feet above the ground in a net off a helicopter, dozens of bighorn sheep are less than a day away from a new beginning — if they make it at all. ...

Even as snow becomes less consistent in the Sierra Nevada mountain range, climate change could be making deadly avalanches more common, threatening the recovery of bighorn sheep there.

RENO, Nev. (AP) - Wildlife biologists say they're concerned that contact with domestic sheep could put an endangered population of Sierra bighorn sheep at risk for disease. Sheep ranchers call it a ...

To improve lifetime reproductive success, maternal ungulates should pursue behavioral strategies that reduce risk of offspring mortality. Predation is a leading cause of neonatal mortality; thus, ...