Collared kingfisher
(Sả khoang cổ, Todiramphus chloris)

Collared kingfisher(Sả khoang cổ, Todiramphus chloris), also white-collared kingfisher, black-masked kingfisher or mangrove kingfisher.
The collared kingfisher (Todiramphus chloris) is a medium-sized kingfisher belonging to the subfamily Halcyoninae, the tree kingfishers.

Alcedo, Alcedinidae: Latin word for kingfisher. 
Halcyon: a name for a bird in Greek mythology generally associated with the kingfisher.