Orange-Breasted Green Pigeon
(Cu xanh khoang cổ, Treron bicinctus) 

The orange-breasted green pigeon (Treron bicinctus) is a pigeon of the genus Treron of 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".

bicinctus: from bi +cinctus: (New Latin) double-belted, double-girdled
cincta, cinctus: Latin: surrounded, encircled, having been surrounded. wreathed, crowned, having been crowned.