Tarsi partially feathered. Tail of eighteen feathers. Frilled ruff on each side of neck. One species.
B. umbellus. Male 17". Female 16". The Ruffed Grouse. Plumage subject to great climatic variation. Males never congregate during breeding season. E. United States. Eight to fourteen eggs, pale buff, spotted pale brown. Besides this species (the lighter rufous), there are—a darker rufous variety, locally known as B. sabinii, in the W.; a lighter grey, B. umbelloides, in the Central Rocky Mountains; and a darker form, with dusky breast-bars more defined, from British Columbia.