Wigeon Anas penelope movements and turnover: a report on the first two seasons

Content Provider	CiteSeerX
Author	Mitchell, Carl Owen, Myrfyn
Abstract	The Wigeon Anas penelope is a grazing duck which used to winter almost entirely on estu aries in Britain, feeding on Zostera and algae on mudflats and grazing saltmarsh grasses (Atkinson-Willes 1963). The species has, in recent decades, changed its distribution both by moving increasingly inland to feed (Owen & Williams 1976) and by shifting from unpro tected areas to reserves (Owen & Salmon 1985). The number of Wigeon wintering in Britain has not shown a substantial trend in either direction since 1960, though a number of cold winters in the last decade has resulted in temporary influxes (Owen et al. 1986 and Fig. 1) and the total for northwest Europe has also
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