Gelochelidon is a genus of terns in the bird family Laridae.
The name combines the Ancient Greek gelao meaning "to laugh" with khelidon meaning "swallow".

1/ Gull-billed tern (Nhàn chân đen, Gelochelidon nilotica), formerly Sterna nilotica
formerly placed in the genus Sterna.
The specific epithet nilotica is from Latin niloticus meaning "of the River Nile".