Collared laughingthrush 
(Khướu đầu đen má xám, Trochalopteron yersini)

Leiothrix Leiothrichidae Ancient Greek leios meaning "smooth" and thrix meaning "hair".
The name Trochalopteron combines the Ancient Greek trokhalos meaning "round" or "bowed" with pteron meaning "wing".

The collared laughingthrush, endemic to Vietnam, is a species of bird in the family Leiothrichidae.