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

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Migratory. Passage oceanic towards Hawaiian Is, but many birds move along outer coast and Islands of British Columbia and Washington; some birds pass Kuril Is, Japan and Korea on migration, but probably most reach Australia directly across Pacific, some via New Guinea; stragglers reach n New Zealand. 1 st –year birds often remain S during breeding months. Spring migration Apr-May; autumn migration mid-Jul to mid-Oct. Probably high fidelity to breeding sites.   (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,
• Copyright: GROMS/BfN - www.groms.de
  
  (A digitised version of this map is published in GIS shape format on the GROMS CD).