Idaho’s 1,019 pronghorn records place it among the five most recorded mammals in the state atlas, and they belong overwhelmingly to the Snake River Plain and the big sagebrush basins. Elmore, Gooding, and Ada counties lead, with Custer and Butte close behind.
The fastest animal in the West
The pronghorn is the fastest land mammal in North America, able to hold high speed for miles, with huge eyes set for scanning open country. That build commits it to treeless ground, and Idaho’s record shows it: bands across the Snake River Plain, the prairie country of Camas County, and the open basins around Craters Of The Moon National Monument, where sagebrush provides both food and fawning cover.
Winter herds, spring dispersal
Pronghorn gather into larger herds on low winter range when snow covers the high basins, then scatter as spring forage greens up. Idaho’s reports spike in January, when dark herds show plainly against the snow, and rise again in April as the bands break up ahead of fawning season.
Status in Idaho
NatureServe ranks the pronghorn S3, Vulnerable, in Idaho even though the species is G5 globally. It is native to the state, and USGS NAS does not list it as nonindigenous here.
Full species profile
