Tetraonine
a typical sub-family of the Tetraonidæ, chiefly from the N. parts of the Palæarctic and Nearctic regions, with the following genera: Tetrao, Bonasa, Centrocercus, Dendragopus, Canace, Falcipennis, Pediocætes, Cupidonia, and Lagopus. They are rather large in size, heavy in body, with small heads, the nasal fossæ filled with feathers concealing the nostrils; neck moderately long; wings short, rounded, and concave beneath; stout legs and feet; toes with pectinations of scales along the edges, hind toe elevated above the plane of the rest; tarsi covered with feathers, in Bonasa partially, in Lagopus, to the claws.