A mystery involving a Rocky Mountain bighorn sheep living far outside of its range in New Mexico has come to an end with a discovery it was killed by a cougar.

Respiratory disease in bighorn sheep is very serious, but here are some facts that are ignored by Lewandowski. ... white-tailed deer, bison, moose, caribou, antelope and thin horn sheep.

Domestic sheep diseases aren’t the only modern threat to the Sierra bighorn. Another has been avalanches and starvation during extreme winters, particularly among populations that can’t ...

With more than 200 days of no measurable rain in Las Vegas and counting, Southern Nevada’s beloved bighorn sheep are reaching a crisis point. ... Far before white settlers reached Las Vegas, ...