Greater Sage-Grouse

Overview

The Greater Sage-Grouse is the largest grouse species in North America, found across sagebrush steppe habitats of the western United States and southwestern Canada. It is closely tied to sagebrush ecosystems for food, cover, and its dramatic communal courtship displays known as leks.

Males are known for their striking breeding display, in which they fan a spiky, pointed tail upward while inflating yellow air sacs on the chest to produce a distinctive popping sound intended to attract females.

Feather Identification

• Body feathers: mottled gray-brown with fine black and buff barring across the back and wings, providing camouflage in sagebrush habitat
• Tail feathers: long, narrow, and sharply pointed, fanned into a spiky array during display, unlike the rounded tails of most other grouse
• Breast feathers: white on the upper breast in males, contrasting with a solid black belly patch
• Throat/neck: black feathering forms a dark bib, bordered by a white collar-like band in displaying males
• Air sacs: bare, yellow-olive skin patches on the chest, inflated during display (not feathered)
• The combination of a spiky pointed tail, black belly, and white breast readily distinguishes this species from other North American grouse such as the rounder-tailed Sharp-tailed Grouse

Plumage Details

Males display mottled gray-brown body plumage with a black belly, white breast, and black throat bordered by white, along with the diagnostic spiky tail used in lek displays. Females are smaller and more uniformly mottled brown and buff throughout, lacking the black belly patch, white breast band, and spiked tail display.

Juveniles resemble females. The annual molt renews the pointed tail feathers, which can become worn and frayed by the end of the breeding display season before replacement.

Habitat & Range

Greater Sage-Grouse are found exclusively within sagebrush steppe habitat across the Great Basin, Rocky Mountain foothills, and northern Great Plains regions of the western United States and southwestern Canada. The species is largely non-migratory or makes only short seasonal movements between summer and winter sagebrush habitat, remaining closely tied to this specific plant community year-round.

Behavior & Field Notes

Greater Sage-Grouse gather at traditional lek sites each spring, where males perform synchronized strutting displays, inflating air sacs and fanning their spiked tails to attract females. Diet consists mainly of sagebrush leaves along with seeds, forbs, and insects, particularly important for chicks in early life.

Nests are shallow ground scrapes typically placed beneath sagebrush cover for protection. The voice includes a range of popping, swishing, and low booming sounds produced during lek display, along with softer clucking calls. In the field, sage-grouse are most easily observed at dawn lek gatherings, where the spiky tail display is unmistakable.