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

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Migratory movements and winter range poorly known. Normally departs from colonies Aug to early Sept (exodus latest in N), wintering largely in seas within breeding range where waters remain ice-free, with some S movement into N Pacific, in frequently S to N British Columbia and N Japan (Hokkaido). Arrives back on land at colonies from late Apr to mid-Jun, non-breeders appearing 3-4 weeks later than breeders.   (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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