MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
The Iceland population of Whooper Swan -Cygnus cygnus- breeds in Iceland and winters primarily in Britain and Ireland, with a few migrating to Europe. Four other populations of Whooper Swan breed in 1. Scandinavia and west Russia and winter in northwest and central Europe; 2. Black Sea and east Mediterranean population breeds in northern Europe and western Siberia; 3. Caspian and central Asia population breed in west and central Siberia; and 4. Asia population breed in central and east Siberia to northeast China. Whooper Swans undertake what is probably the longest sea crossing of any swan species, migrating 800-1, 400 km at up to 8000 metres altitude between Iceland and Britain/Ireland which they can achieve in 14-15 hours at speeds up to 50mph (80 km/ph). With warming winters and human feeding a few birds overwinter in the capital, Reykjavik. City centre lake, Iceland.
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