The two species of Wood-Partridges found within the limits of the Empire occur only in the thick forests of the extreme south of Tenasserim. They possess the remarkable character of having only a rudimentary hind-claw; the claw presenting the appearance of having been cut off close to the toe. Both species are of very beautiful plumage.
The Crested Wood-Partridge (Rollulus) has 12 tail-feathers. Both sexes have a bunch of black hairs, more than an inch in length, springing from the forehead, and the male in addition has a bushy crest of disintegrated feathers nearly two inches in length. The leg is without a spur. The two sexes differ in plumage.
The Ferruginous Wood-Partridge (Caloperdix) has 14 tail-feathers. Both sexes are alike in plumage and have no crest. The male has one or two spurs on each leg ; the female is without a spur