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Brown Bullfinch 
(Mỏ ngắn, Pyrrhula nipalensis)

The brown bullfinch (Pyrrhula nipalensis) is a species of bird in the true finch family, Fringillidae.

Fringillidae, Fringilla: Latin fringilla for finch.
Pyrrhula comes from the Greek word pyrrhoulas (πυρρούλας), meaning "worm-eating bird" or a "flame-colored bird". This name was given by Aristotle to a small, reddish bird he identified, though the bullfinch it refers to is actually mostly vegetarian. 

Grey-headed bullfinch (Pyrrhula erythaca), Gray-headed bullfinch, or Beavan's Bullfinch

The Grey-headed bullfinch (Pyrrhula erythaca) is a species of finch in the family Fringillidae.

Fringillidae, Fringilla: Latin fringilla for finch.
Pyrrhula comes from the Greek word pyrrhoulas (πυρρούλας), meaning "worm-eating bird" or a "flame-colored bird". This name was given by Aristotle to a small, reddish bird he identified, though the bullfinch it refers to is actually mostly vegetarian. 
The specific epithet erythaca comes from the Ancient Greek eruthros meaning "red".
The term "erythaca" itself comes from the Ancient Greek word erithakos, meaning "red breast", likely referring to a robin or a red-breasted bird.

Pyrrhula is a small genus of passerine birds, commonly called bullfinches, belonging to the finch family (Fringillidae).

1/ Brown Bullfinch (Mỏ ngắn, Pyrrhula nipalensis)
2/ Grey-headed bullfinch (Pyrrhula erythaca), Gray-headed bullfinch, or Beavan's Bullfinch

Fringillidae, Fringilla: Latin fringilla for finch.
Pyrrhula comes from the Greek word pyrrhoulas (πυρρούλας), meaning "worm-eating bird" or a "flame-colored bird". This name was given by Aristotle to a small, reddish bird he identified, though the bullfinch it refers to is actually mostly vegetarian.