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.
Preliminary data indicates the disease is most intense in Idaho’s Unit 11 between Cave Gulch Creek and the mouth of the Salmon River, where eight dead bighorn sheep have been found. The agencies have also collected one dead sheep each from Idaho units 13 and 18 and from the western side of the Snake River in Oregon and Washington.