From:
Alfred Newton
To:
Charles Robert Darwin
Date:
21 Jan 1867
Source of text:
DAR 84.1: 22–5
Summary:
Suggests that, in some birds, plumage of males is less colourful than that of females; the reason is that the males perform the duties of incubation [see Descent 2: 204 n.].
Contributor:
Darwin Correspondence Project
