Breeds islands (including peripheral ones) in Caribbean, and Fernando de Noronha and Trindade (off Brazil), and Boatswain Bird Island (Ascension group, South Atlantic Ocean).
rubripes
rubripes (Indopacific)
Breeds islands in tropical Pacific and Indian oceans, from Seychelles and Malagasy region through Indian Ocean and Indonesian seas, northern Australasia, northward to southern Japanese islets, and eastward to Hawaiian Islands and Pitcairn group.
websteri
websteri (Eastern Pacific)
Breeds islands of far eastern Pacific, including Revillagigedo, Tres Marias, Isabel, and Clipperton (off Mexico), Violin and Cocos (off Costa Rica), Malpelo (off Colombia), and Galápagos.
