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Darwin Correspondence Project
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From A. R. Wallace   4 October 1868

Summary

Sexual differences in coloration. Sexual selection versus natural selection as explanations. ARW continues to argue against sexual selection, saying that natural selection, in keeping the female dull for protection, would account for differences in sexual colouring more effectively than inheritance and partial transmission of sexually selected male colours. Colours of female birds of paradise. Protective coloration. Disagrees with CD on coincidence of hidden nests and bright colours of females.

Author:  Alfred Russel Wallace
Addressee:  Charles Robert Darwin
Date:  4 Oct 1868
Classmark:  DAR 106: B68–69
Letter no:  DCP-LETT-6408

From Edward Blyth   4 October 1868

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Summary

Replies to CD’s questions on sexual differences in birds.

Author:  Edward Blyth
Addressee:  Charles Robert Darwin
Date:  4 Oct 1868
Classmark:  DAR 84.1: 100–2
Letter no:  DCP-LETT-6409
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