Caloperdix Blyth, Ibis, 1867, p. 160.
Type, Perdix oculea Temm.
The genus Caloperdix differs from both Tropicoperdix and Arborophila in the formation of the legs. The tarsus is considerably longer than the middle toe and claw together and is armed with one or more spurs. The toes are short and the claws, though straight, are not as long as they are in the other genera. From Tropicoperdix it also differs in having no superorbital ossicles; the wing is shaped as in Arborophila and the tail consists of fourteen feathers.
The species ranges from Java, Borneo and Sumatra, through the Malay Peninsula into South-Western Siam and Tenasserim.