Slaty-Backed Forktail 
(Chích chòe nước trán trắng, Enicurus schistaceus)

The slaty-backed forktail (Enicurus schistaceus) is a species of forktail in the family Muscicapidae.

The slaty-backed forktail has a slaty color head and mantle.
The black-backed forktail has a black color head and mantle.
The spotted forktail has spotted mantle.

Enicurus : Greek word  henikos – singular or unique;  ouros -tailed.
schistaceus: Latin schistaceus slate-coloured, slate-grey.