(1969) Tropicoperdix charltoni charltoni.
THE MALAY Green-LEGGED HILL-PARTRIDGE.
Perdix charltoni Eyton, Ann. Mag. Nat. Hist., (1) xvi, p. 230 (1845) (Malacca).
Vernacular names. Sang scrok (Malayan).
Description.— Adult male. Upper plumage and wings similar to that of the preceding bird but from back to rump and tail the whole surface more or less vermiculated with black, grey and dull buff, the first also forming inconspicuous bars; the chin, throat, forehead and broad supercilium are white with black markings and there is no tinge of rufous on these parts nor on the hind-neck; lower cheek white with black spots ; ear-coverts and a patch behind them golden-rufous; behind this again a broad black patch down the sides of the neck; chest deep maroon-chestnut; breast and anterior flanks buff with narrow bars of brownish-black next the chestnut, this becoming deeper black and much broader posteriorly; lower head and upper abdomen deep rufous, becoming almost pure white on the posterior abdomen, vent and under tail-coverts, the last barred and edged with black and rufous.
Colours of soft parts. Iris brown; bill olive or sap-green to black; orbital skin blood-red; legs and feet sap-green to dull yellow or yellowish-green.
Measurements. Wing 158 to 165 mm.; tail 66 to 74 mm.: tarsus about 36 to 40 mm.; culmen 15 to 16 mm.
Female. Like the male but with less chestnut on the lower plumage.
Distribution. Tenasserim, South Siam, Malay States. The specimens in the British Museum labelled Penang are probably all from Perlis on the Peninsula opposite Penang, as the bird does not occur in that island.
The race from Annam with differently coloured ear-coverts and marked with black drops instead of bars on the breast and flanks has been named tonkinensis by its discoverer, Delacour.
Habits. This is a Partridge of the low country, keeping to dense forest and scrub, very shy and retiring and most difficult to observe though easy to trap. So far as is recorded, the habits seem very similar to those of the genus Arborophila.