Tail of eighteen feathers, wedge-shaped. Males with an inflatable air-sac on each side of neck. Two species.
P. phasianellus. Male 16 4/5". Female 16". The Northern S.T. Grouse. Above black, marked buff and white. Breast black, with white heart-shaped patch. British America. Seven to fourteen eggs (1.8 x 1.3), brown, spotted red-brown.
P. columbianus. Male 15". Female 14". The Columbian S. T. Grouse, or Prairie-Chicken. Above white and buff, marked black. Breast white, banded black. Plains of the United States.