Origin of British Glaucous Gulls. I read with interest A. R. Dean's comments on the possible origins of Glaucous Gulls Larus hyperboreus in Britain and related incidences of occurrences of hybrid Glaucous X Herring Gulls L. argentatus {Brit. Birds 77: 165-166). Both Glaucous and Iceland Gulls L. glaucoides are annual winter visitors to southwest England. Virtually without exception, the former is t
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