Notes

01 May 1963 Comments Notes FOE some years now I have been paying particular attention to the nestlings of common birds. It is of course now known to all ornithologists that the parents keep the nest clean (as a general rule) by carrying away the excrement, and often by swallowing ...
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Letters

01 September 1937 Comments Letters SIRS,--I think Mr. David Lack is clearly right in concluding from the scene he describes (antea, p . 82) t h a t the crest of the Goldcrest (Regulus r. anglorum) is an instance of ornamentation functioning as a " threatcolour", and used for t h a t purpo...
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