The Sooty Tern (Onychoprion fuscatus) is a species of bird (Aves) in the family Laridae (Gulls, Terns, and Skimmers) and order Charadriiformes (Auks).
Onychoprion aleuticus
Onychoprion anaethetus
Onychoprion lunatus
Onychoprion fuscatus