Bridled tern (Nhàn lưng đen, Onychoprion anaethetus)

The bridled tern (Onychoprion anaethetus) is a seabird of the family Laridae.
This bird is migratory and found in Atlantic, Latin America, South-East Asia, West Africa.

Charadriiformes, Charadriidae, Charadrius: Late Latin word for a yellowish bird mentioned in the fourth-century Vulgate; from Ancient Greek kharadrios a bird found in ravines and river valleys (kharadra, "ravine").

Laridae:from Ancient Greek laros or Latin larus, which appears to have referred to a gull or other large seabird.

The genus name Onychoprion is from Ancient Greek onux, "claw" or "nail", and prion, "saw".

The specific anaethetus means "senseless, stupid".