Feet only partially feathered, lower part entirely naked. Tail of sixteen feathers, wedge-shaped. Three species.
T. bonasia. Male 14". Female 13". The Hazel Hen. Above grey or rufous, barred on head and back with black. Breast black, margined white, and sometimes with white spots. Chin and throat black.— Female: Chin and throat mostly white. Known also as "Hazel Grouse," or "Gelinotte." Haunts hilly and wooded districts. From Scandinavia to Japan, and southwards to N. Spain, N. Italy, Transylvania, Altai Mountains, and N. China. Eight to twelve eggs, pale buff, spotted brown.
T. griseiventris. Male 14". Female 13". The Grey-bellied Hazel Hen. Breast sandy, with narrow black bars. Chin black. Throat black, tipped rufous. Chest reddish, barred and tipped grey.— Female: Chin white. Chest black, barred rufous, tipped grey. E. Russia.
T. severtzovi. 13 1/2". Severtzov's Hazel Hen. Breast black, barred and tipped white. Outer tail black, barred white. Chin and throat black.— Female: Chin and throat buff, tipped black. N.E. Central Asia. (O. G. i. 26-77.)