Le genre Treron comprend 29 espèces d'oiseaux appartenant à la famille des Columbidae. Les oiseaux de ce genre se appellent Colombar.

Columbiformes, Columba: du latin columba (“pigeon”). grec ancien κόλυμβος (kólumbos, “plongeur”), from κολυμβάω (kolumbáō, “plonger, nager”).
Le nom du genre Treron vient du grec ancien trērōn signifiant "pigeon".

1/ Colombar de Siebold
White-bellied green pigeon (Cu xanh Bụng Trắng, Treron sieboldii)
2/ Yellow-footed green pigeon (Cu xanh chân vàng, Treron phoenicopterus), also known as yellow-legged green pigeon
3/ Cinnamon-headed green pigeon (Cu xanh cổ nâu, Treron fulvicollis)
4/ Pink-necked green pigeon (Cu xanh đầu xám, Treron vernans) 
5/ Sri Lanka green pigeon or Ceylon green pigeon (Cu xanh đuôi đen, Treron pompadora) 
Many authorities split the species from the pompadour green pigeon complex.
6/ Pin-tailed green pigeon ( Cu xanh đuôi nhọn, Treron apicauda) 
7/ Orange-breasted green pigeon (Cu xanh khoang cổ, Treron bicinctus) 
8/ Thick-billed green pigeon (Cu xanh mỏ quặp, Treron curvirostra)
9/ Wedge-tailed green pigeon or Kokla green pigeon (Cu xanh sáo, Treron sphenurus)
10/ Yellow-vented green pigeon (Cu xanh Seimun, Treron seimundi)
11/ Ashy-headed green pigeon (Treron phayrei)
Cu xanh đuôi đen