While many of Colorado’s Rocky Mountain bighorn sheep herds continue to struggle with disease, 2024 was a better year for the state animal. Andy Holland, a big game manager at Colorado Parks and ...

Comparisons between historical and modern data reveal a consistent decline in genetic diversity,” said Frances Cassirer, IDFG ...

Like the majority of Colorado’s big game species, the success of Rocky Mountain bighorn sheep is up against habitat loss and disturbances, a changing climate and growing recreation and human pressure.

RIVERTON — Four decades ago, Fremont County was home to the largest herd of Rocky Mountain bighorn sheep in the lower 48 states – an estimated 2,500 animals. By the early 1990s, disease – particularly ...

The Colorado state mammal springs up near-vertical cliff faces with ease, thanks to specialized hooves. Rocky Mountain Bighorn Sheep have modified toenails that can snag little protrusions, and soft, ...