ORDER ALECTORIDES
Angle of the mandible always truncated, hind toe generally raised above level of others.
FAMILY GRUIDÆ
Nasal depression more than half as long as maxilla; rectrices twelve.
106. Grus (Crane). Upper mandible deeply channelled; nostrils medial; wings moderate; third primary longest.
FAMILY OTIDIDÆ
(Bustards)
Bill flattened and obtuse; no hind toe; tarsi unarmed; wings very short; rectrices sixteen to twenty.