a grouse, Pedioecetes phasianellus, of prairies and open forests of western North America, similar in size to the prairie chicken but with a more pointed tail.
sharp-tailed grouse (shärp'tāld') n. A grouse (Pediocetes phasianellus) of the northwest United States and Canada, having a short pointed tail, a pale color, and dark V-shaped breast markings.