THE main purpose of the Enquiry, conducted with the help of the British Trust for Ornithology in the winters of 1949-50 and 1950-51, was to obtain definite information on the present winter status of this species in the British Isles and, if possible, to discover if there had been any significant change in recent years. An extension of the Enquiry in 1950 to cover the migratory movements of this g...

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