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- world; a study of the social behaviour of birds. London: Collins. ISBN 0002194449. OCLC 1029697. Gould, James (1983). Ethology: The Mechanisms and Evolution...20 KB (2,503 words) - 00:07, 3 September 2024
world; a study of the social behaviour of birds. London: Collins. ISBN 0002194449. OCLC 1029697.{{cite book}}: CS1 maint: multiple names: authors list (link)...19 KB (2,402 words) - 04:20, 4 October 2024
Tinbergen, Niko (1953). The Herring Gull's World. Collins. p. 14. ISBN 0-00-219444-9. white has proved to be the most efficient concealing coloration for...79 KB (8,177 words) - 20:35, 7 September 2024
