Critter Chat

A survivor of six 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 numbers, braving the highest peaks and harshest winters in the eastern Sierra Nevada mountains. What do we know about these herds of hidden mountaineers? What are the experts saying as to their populations and health?  
Photo: Steve Yeager