In eastern Atlantic, breeds Cape Verde Islands and off Senegal, in eastern Pacific, islands in Gulf of California, and off western Mexico, Colombia to Chile, Galapagos; in Caribbean, Puerto Rico to Lesser Antilles, Tobago, and islands off northern Panama and off Venezuela.
aethereus
Breeds Fernando de Noronha, Abrolhos Islands, Ascension, and St. Helena islands (southern Atlantic).
indicus
Breeds coastal Red Sea, Gulf of Aden, Socotra, off Somalia, off eastern Arabian Peninsula, and Persian Gulf; also Con Dao Islands (off Vietnam); winters northeastern Indian Ocean to western Indian coast.
