In the winters of 1973/74 and 1974/75 there wer e two very large influxes of Rough-legged Buzzards into Britain. In the first winter, 170 may have been present during October, and up to 250 in the same month of the following year. These numbers, and the subsequent wintering populations of up to 80 and 100 respectively, far exceeded those reported during any previous influx
Sharrock (1970) de
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