Cinnamon Bittern 
(Cò lửa, Botaurus 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 Botaurus is derived from Medieval Latin butaurus, Bos (ox) and taurus (bull), because the bittern's call resembles the bellowing of a bull.
In Latin, cinnamomeus means "cinnamon-colored" or "cinnamon-brown".