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Status of Anatidae population wintering in the Danube region in Croatia from 1999 to 2002

18 Anatidae species were registred.In the Danube region the higest numbers and most frequent occurence were recorded for wintering populations of Anas platyrhinchos, Anser albifrons, Anser fabalis and Anser anser.A globally threatened species - Aythya nyroca - was also recorded there.The average of 20, 719 individuals of ducks, geese and swans annuallu wintered on the Danube and its inundation area.The Shannon - Wiener diversity index ranged from 1, 41 - 1, 95 and was considered relatively low.The Danube inundation area in CDroatia is a significant feeding and resting place for many Anatidae during the migrations and in the winter.

Anatidae; International Waterbird Census; biodiveristy; Danube; Croatia

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