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Woodswallows are soft-plumaged, somber-coloured passerine birds in the genus Artamus of the family Artamidae.
The generic name Artamus is derived from the Ancient Greek artamos, meaning butcher or murder.

1/ Ashy woodswallow (Nhạn rừng, Artamus fuscus), sometimes also called the ashy swallow-shrike

Ashy Woodswallow 
sometimes also called the ashy swallow-shrike
(Nhạn rừng, Artamus fuscus)

The ashy woodswallow (Artamus fuscus), also called the ashy swallow-shrike, is a woodswallow which is found in south Asia.

Artaminae, Artamus: Ancient Greek artamos, meaning butcher or murder.
fuscus: Latin fuscus brown, dusky, dark-colored.