Sooty tern (Nhàn nâu, Onychoprion fuscatus), coloquially wideawake tern or just wideawake

The sooty tern (Onychoprion fuscatus) is a tern in the family Laridae.

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 fuscatus is Latin for "dark".