Cinnamon Bittern 
(Cò lửa, Ixobrychus cinnamomeus) or chestnut bittern

The cinnamon bittern or chestnut bittern is a small Old World bittern of the family Ardeidae of the order Pelecaniformes.

Ardeidae, Ardea: Latin word meaning "heron".
The genus name combines the Ancient Greek ixias, a reed-like plant and brukhomai, to bellow.