Tail of eighteen feathers about three-quarters length of wing. First primary equal to eighth or ninth (fourth longest). Sexes alike. Males have spurs. Two species of Grouse-like Partridges from Tibet and W. China.
T. obscurus. The Dusky Grouse Partridge from E. Tibet. male 18.6". Above olive, barred buff on wings. Below grey, spotted black. Chin, throat, and foreneck chestnut.
T. szechenyii. Szecheny's G. P. from C. Tibet to Mekong River. male 17.6". Differs from T. obscurus in having chin, throat, and foreneck fawn.