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

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Migratory. Many move to S wintering areas, though some stay in N maritime climatic zone (British Is, Mediterranean, Japan). Moves overland on broad fronts, even across deserts and mountains, usually singly or in small flocks. European population mainly winter in W Africa, and basically moves SSW-SW from mid-Jul to Aug, juveniles following one month alter; moves N from late Mar to Apr .Many Norwegian birds cross Britain, Swedish birds cross W Germany, Finnish cross E Germany. Wintering populations in E, C & S Africa presumably originate CIS. E Asian birds move through Korea, Japan (especially during migration), Hong Kong (both migration), peninsular Malaysia, Wallacea and New Guinea. Many immatures remain in N wintering quarters all year. Migrates at night.   (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).