From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
31 Mar 1868
Source of text:
DAR 46.1: 98–101, DAR 84.1: 69–70
Summary:
Sexual behaviour of chaffinches.
Numbers of female linnets in September.
His experiments on brightly coloured larvae [as food], testing A. R. Wallace’s theory.
His observations of a rookery make him wonder whether it may not be more difficult than we think for birds to pair.
Contributor:
Darwin Correspondence Project