Letters to Editor
nature 140, 974-975 (04 December 1937) | doi:10.1038/140974b0
Wild Birds and Butterflies
G. D. HALE CARPENTER
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DR. W. E. COLLINGE is apparently under a misapprehension as to the degree to which it is claimed that birds eat butterflies. I do not think that it is ever claimed that these insects form the principal food of any bird; only that they are eaten to an extent sufficient to have a selective effect, and I believe that work by Prof. R. A. Fisher has demonstrated mathematically that this extent need be very much less than was previously supposed.
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