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

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Little known. Partial migrant: population of SW India apparently migrates in Oct/Nov to Sri Lanka; birds from N India and Burma move S in Aug-Oct, probably wintering in Malay Peninsula and Greater Sundas, where may be joined by birds from Thailand and Indochina which are absent from breeding areas between Oct and spring; passage through May Peninsula note in Oct-Dec and Apr; wintering birds in Sumatra Nov-May. Post-breeding dispersal of E populations to Taiwan and Ryukyu Is, where species overlaps with wintering G. goisagi, as in Philippines, where present species sedentary. vagrant to Shikoku Is (Japan), Palau Is, Banggai Is (off NE Sulawesi) and Christmas I (Indian Ocean)   (del Hoyo J, Elliott A, Sargatal J (eds), 1992)

• digitised by GROMS, after del Hoyo J A Elliott; J Sargatal (eds) (1992) - 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).