Velvet-Fronted Nuthatch 
(Trèo cây trán đen, Sitta frontalis)

The velvet-fronted nuthatch (Sitta frontalis) is a small passerine bird in the nuthatch family Sittidae.

The term nuthatch refers to the propensity of some species to wedge a large insect or seed in a crack and hack at it with their strong bills.
Sitta, a name derived from sitte, Ancient Greek for the nuthatch bird.
Latin word meaning "frontal" (= relating to the forehead).