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R espon ses o f wintering Brent G eese to hum an disturbance
unpublished
W ildfow l E co log y S ym posiu m 1950. Wigeon were first noticed feeding on germinating winter cereals in the 1963 winter and Pintail on cereals and potatoes in the mid-1960s. This coincides with an increased usage o f the Ouse W ashes by these species as well as the prolonged freeze-ups in those winters. During the period o f study, continuous freeze-ups were uncom m on and usually lasted for less than one week. When they occurred the populations o f ducks, except Mallard, Pintail and Wigeon
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