Wildlife officials from Idaho, Washington and Oregon are monitoring a new outbreak of pneumonia that is killing wild bighorn sheep in the northern end of Hells Canyon.

Frances Cassirer has been working to recover bighorn sheep in Hells Canyon for more than two decades.

The entire operation is part of the Hells Canyon Initiative, a partnership between Idaho, Oregon and Washington, the Foundation For North American Wild Sheep and the Oregon Hunters Association ...

How many bighorn sheep can the greater Hells Canyon region support? Not too many years ago, that question might have seemed absurd to wildlife managers. Bighorn numbers were stagnant at best. A ...