The birds with a red head in Vietnam could be:
1/ Scarlet-Backed Flowerpecker
(Dicaeum cruentatum)
Chim sâu lưng đỏ
Male: Remarkably with a scarlet or red stripe or line extending from the crown to the rump.
2/ Common flameback, also referred to as the common goldenback
(Gõ kiến vàng nhỏ, Dinopium javanense)
a woodpecker with a red head and golden color back.
3/ Red-Collared Woodpecker
Picus rabieri
4/ Red-headed trogon
(Nuốc bụng đỏ, Harpactes erythrocephalus)
