White undertail coverts visible in flight. Elongated central tail feathers. Male in display has pinkish to pale violet air sacs on each side of neck. In Wyoming, restricted to the Sierra Madre foothills and Washakie Basin southwest Carbon County. This population also extends into northwestern Colorado.
Few males mate with all females in area.
Females lay an average of 12 eggs in a nest composed of soft vegetation. Nest often located under shrubs, small trees or dense vegetation. Precocial chicks are able to walk almost immediately after hatching and can fly at about 10 days. Chicks initially eat insects and gradually switch to vegetation over the summer. A petition was recently filed to have this sub-species listed as threatened under the Endengered Species Act.