Winter recreation may be one of the impacts to the remaining bighorn.
This population of bighorn sheep has dwindled to very low numbers. Inbreeding, habitat loss due to development, and domestic sheep disease have restricted these sheep to very high elevation and sites of low productivity so human entry into these areas during winter may have a severe impact.
Teton Range herd of bighorns at risk of extinction
Scientists are exploring ways to reduce risks to isolated sheep.
By Cory Hatch, Jackson Hole, Wyo.