Inner notch of breast-bone sometimes reduced to a foramen. Wings long and pointed. First or second quill longest. Eleven primaries. Fifth secondary wanting.
Hind toe raised. Tarsus feathered in front. Toes naked ( PTEROCLES . SAND-GROUSE. PTEROCLURUS. PINTAIL SAND-GROUSE
No hind toe. Tarsus feathered throughout. Toes feathered. SYRRHAPTES . PINTAIL SAND-GROUSE.