Thick-Billed Green Pigeon 
(Cu xanh mỏ quặp, Treron curvirostra)

The thick-billed green pigeon is a species of bird in the family Columbidae.

Columbidae, Columba: Latin columba (“dove, pigeon”). Ancient Greek κόλυμβος (kólumbos, “a diver”), from κολυμβάω (kolumbáō, “dive, plunge headlong, swim”).
Pigeon is a French word that derives from the Latin pīpiō, for a "peeping" chick;
Dove is an ultimately Germanic word that refers to the bird's diving flight.
The genus name Treron is from the Ancient Greek trērōn meaning "pigeon" or "dove".
curvirostra is Latin for "curved bill".