Crow-billed drongo 
(Chèo bẻo mỏ quạ, Dicrurus annectens) 

The crow-billed drongo (Dicrurus annectens) is a species of bird in the family Dicruridae. 
The bird is native to moist tropical forests of southeastern Asia and is found in: Bangladesh, Bhutan, Brunei, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Philippines, Singapore, Thailand, and Vietnam.

Dicruridae or Dicrurus is derived from the Greek words dikros meaning forked, ouros meaning tailed.
annectens: from the Latin words ad- (an- variant of ad- before n), "towards"; nectens, "tying" or "connecting".