Variation in a population of Yellow Wagtails
01 September 1959
Main paper
DURING 1957 and 1958 several greyish-headed yellow wagtails, which appeared to be identical in appearance with Sykes's W a g tail (Motacilla flava beema) of western Siberia, bred at Beddington sewage farm, Hackbridge, Surrey. Since the discovery by Arnold...
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