Fulmar incubating eggs of Herring Gull with its own.--On 27th May 1963 I was walking along a cliff top four miles south of Ballantrae, Ayrshire, when I surprised a Fulmar Fulmarus glacialis off its nest. As it flew, a brown egg rolled out and smashed on the rocks below. I then found that two eggs still remained in the nest, one the Fulmar's and the other that of a Herring Gull~Larusargentatus, and ...

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