Orange-bellied flowerpecker 
(Dicaeum trigonostigma) 
Chim sâu ngực xám

The orange-bellied flowerpecker (Dicaeum trigonostigma) is a species of bird in the family Dicaeidae. 
The bird is found in Bangladesh, Brunei,Indonesia, Malaysia, Myanmar, the Philippines, Singapore, and Thailand.

The name Dicaeum is from the Ancient Greek dikaion. Cuvier claimed that this was a word for a very small Indian bird.
trigonostigma Greek trigonos: triangular; stigma: mark.