Species fact sheet by Global Register of Migratory Species - www.groms.de

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Rarely seen on water and believed to sleep on the wing. Once chicks fledge (or die), all birds leave colonies. Adults return after 2-3 months at sea, and settle only at night for 2-3 months prior to initiating new breeding new cycle. Adults from West Indies disperse into Gulf of Mexico and Caribbean where some winter; juveniles across Atlantic and moves S down African coast. Little information on Indian Ocean population, which probably disperse widely over Indian Ocean. Pacific adults disperse away from colony Jun-Oct and begin to return to area in late Nov, occupying colony in Feb, but not laying until Apr (Johnston Atoll).   (del Hoyo J, Elliott A, Sargatal J (eds), 1996)

• digitised by GROMS, after del Hoyo J A Elliott; J Sargatal (eds) (1996) - www.hbw.com,
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