White-bellied erpornis 
(Khướu mào bụng trắng, Erpornis zantholeuca) or simply erpornis
Formerly placed in Yuhina and often still misleadingly called "white-bellied yuhina".

"Vireo" is a Latin word referring to a green migratory bird; other possible meanings: green, fresh, verdant, vigorous...
Erpornis : Greek word herpo – to creep about ; ornis- bird.
Zantholeuca : Greek word xanthos – yellow; leukos – white.

The white-bellied erpornis or simply erpornis is the only member of the genus Erpornis of the family Vireonidae.