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The genus Sitta comprise the nuthatches which are small passerine birds belonging to the family Sittidae.

1/ Indian nuthatch (Trèo cây bụng hung, Sitta castanea)
From Ancient Greek kastáneia, from kástana meaning chestnut or chestnut tree.
This species has been split by Rasmussen and Anderton (2005) from the chestnut-bellied nuthatch.

2/ Chestnut-vented nuthatch (Trèo cây đít hung, Sitta nagaensis)
 The species name is composed of naga and the Latin suffix -ensis, "that lives in, that inhabits," was given in reference to the area when the type of the species was collected, the Naga Hills.

3/ White-tailed nuthatch (Trèo cây Himalaya, Sitta himalayensis)

4/ Beautiful nuthatch (Trèo cây lưng đen, Sitta formosa)
The name derives from the Latin name Formosus and Spanish word "fermoso", meaning "beautiful".

5/ Yellow-billed nuthatch (Trèo cây mỏ vàng, Sitta solangiae)

6/ Velvet-fronted nuthatch (Trèo cây trán đen, Sitta frontalis)
Latin word meaning "frontal" (= relating to the forehead).

The nuthatches constitute a genus, Sitta, of small passerine birds belonging to the family Sittidae.
The nuthatches are all in the genus Sitta, a name derived from sitte, Ancient Greek for this bird.
The English 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.