The cattle egret (Bubulcus) is a cosmopolitan genus of heron (family Ardeidae) found in the tropics, subtropics, and warm-temperate zones. The genus contains two species: the western cattle egret and the eastern cattle egret. Some authorities regard them as a single species. 

The genus name Bubulcus is Latin for herdsman, referring to this species' association with cattle. 

1/ Western cattle egret (Cò ruồi, Bubulcus ibis)

2/ Eastern cattle egret (Cò ruồi, Bubulcus coromandus)