The last year was a difficult one for Rocky Mountain bighorn sheep herd health in Colorado, while desert bighorn sheep found in far-western Colorado are faring better, according to Colorado Parks and ...

MOUNT EVANS, Colo. — Bighorn sheep once just about posed for Barb Day when she crept across their high-country habitat with her camera. Now, in the latest twist of an ecological saga, non-native ...

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 ...

1. Fitness costs of reproduction are expected when resources are limited. Costs drive the evolution of life-history strategies and can affect population dynamics if females change their allocation of ...