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Egg Shell Removal by the Black-Headed Gull, Larus ridibundus L.; A Behaviour Component of Camouflage
N. Tinbergen ; G. J. Broekhuysen ; F. Feekes ; J. C. W. Houghton ; H. Kruuk ; E. Szulc 1962Behaviour, 19(1/2)The Black-headed Gull removes the empty egg shell shortly after the chick has hatched. The present paper describes some experiments on the function of this response, and on the stimuli eliciting it. Carrion Crows and Herring Gulls find white egg[...]
