Treron Vieill., Analyse, p. 49 (1816).
Type, Columba curvirostra Baffles.
The genus Treron forms a link in the chain with Dendrophasa and Butreron. The rhamphotheca in Treron reaches the forehead, not having the basal half of the bill covered with a soft cere as in Dendrophasa. There is wide naked space round the eye and the colour of the base of the bill and gape is a brilliant red, distinguishing this Green Pigeon at a glance from all its Indian allies ; the wing is long, the primaries very slightly pointed and the third primary deeply and widely scalloped on the inner web ; the under tail-coverts are long and the tail itself very slightly rounded.
Only one species is known, two races of which, T. c. curvirostra and T. c. nepalensis, extend through the greater part of our area to the Indo-Chinese countries and Malay States etc.