Citrine Wagtail 
(Chìa vôi đầu vàng, Motacilla citreola)

The citrine wagtail (Motacilla citreola) is a small songbird in the family Motacillidae.

Passeriformes, Passerina, passerina: Latin passerinus sparrow-like, (i.e. sparrow-sized) (passer sparrow).
Motacillidae, Motacilla: From Latin motacilla (“wagtail”), the word is a diminutive of motare, "to move about".
The term citrine, and the specific name citreola, refers to its yellowish colouration, citreola is Latin for "lemon yellow".