Pink-necked green pigeon 
(Cu xanh đầu xám, Treron vernans) 

The pink-necked green pigeon (Treron vernans) is a species of bird of the pigeon and dove family, Columbidae. 
The bird species is a common species of Southeast Asia, found from Myanmar and southern Vietnam through to the major islands of Indonesia and the Philippines.

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".
vernans Late Latin vernans: brilliant, flourishing (Latin ver: spring).