The deep booming hoots of a courting male Blue Grouse are audible for many yards but because they are so low in pitch, the bird itself can be extremely difficult to find. It is worth the effort, however, because as he hoots, the male fans his tail over his back, spreads the feathers on his neck to reveal the patch of brightly colored skin, and erects the combs over the eyes, producing a striking display. In winter this grouse feeds exclusively on conifer needles; its summer diet consists of insects, seeds, and berries.

description 15 1/2 -21" (39-53 cm). A large grouse. Male dusky gray or bluish gray, with orange-yellow or red comb over eye, patch of yellow skin on neck surrounded by rosette of white feathers, some mottling on wings, and blackish tail with pale gray terminal band. Birds in Rockies lack terminal tail band and have red skin in center of rosette on neck. Females and immatures mottled brown with dark tail.

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