RECORD: Darwin, C. R. n.d. Birds. CUL-DAR84.2.5. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 2.2022. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volumes CUL-DAR80-86 contain material for Darwin's book Descent of man (1871).
[5]
Birds
When colour is injurious it wd be most injurious to the young & inexperienced & to the female on her nest; & as a general rule when the sexes differ greatly the young are protected by dull colours, as well as the female. But the dullest of young - Embryonic
On other hand, colour to be attached in condition to the male sex, must partly appear after sexual organs developed; & in this case is not appear
[5v]
in young, & the young wd be less modified like the modified female.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022