Eastern yellow wagtail 
(Motacilla tschutschensis, Chìa vôi vàng Phuong Dong)

The eastern yellow wagtail (Motacilla tschutschensis) is a small passerine in the wagtail 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 specific epithet tschutschensis is from the locality, the Chukchi Peninsula is eastern Russia.