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

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Migratory. Moves from breeding grounds in C South I to mudflats of estuaries and harbours on N end of North I. leaves rivers late Dec to early Feb; juveniles of first nest depart before parents finish second nest. Migrates via E coast of South I and W coast of North I, probably usually in single flight; juveniles arrive in winter quarters late Dec to early Jan and most adults mid-Jan to Feb; highest numbers present on N coast May-Jul; adults show high degree of site fidelity to wintering and roosting sites. Most birds leave wintering sites in Aug; second-year non- breeders leave half way through breeding season and some, mainly first-year birds, spend summer in North I. Uses stopover sites on return migration, and arrives at river mouths late-Aug to Sept.   (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).