玄燕鷗〔白頂玄燕鷗，白頂黑燕鷗〕

Red Sea and Gulf of Aden, all Seychelles groups from Aldabra ne to Inner Is., Madagascar and Mascarenes (w Indian Ocean) e through the Pacific from Ryukyu and Bonin is. (s Japan) to Hawaiian Is. and Easter Is. group (=Eastern Is., se Polynesia)

Galápagos

Tres Marias and Socorro (w of Nayarit, wc Mexico) to Clipperton (far sw of Mexico), I. del Coco (far sw of Costa Rica), is. Malpelo (far w of Colombia) and Gorgona (just w of sw Colombia; tropical e North Pacific Ocean)

tropical Atlantic from Trindade (e of ne Brazil), Ascension and St. Helena (tropical se Atlantic Ocean), Gulf of Guinea is. and Tristan da Cunha group (ec South Atlantic Ocean); throughout Caribbean from Bush Key, Dry Tortugas (w of Florida) through islands off Yucatan, e Central America and Colombia to French Guiana