Ratchet-Tailed Treepie 
(Chim khách đuôi cờ, Temnurus temnurus)

The ratchet-tailed treepie is a species of bird in the crow and jay family Corvidae. The species is also known as the notch-tailed treepie.

Corvidae, Corvina ( Coracina) / corvina L. corvinus raven-like, raven-black (corvus raven).
temnurus Greek temno to cut; -ouros -tailed.
temno: to cut.
New Latin -urus, -ourus, from Greek -ouros, from oura tail.