From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
26 May 1869
Source of text:
DAR 86: A52a-c, DAR 84.1: 143
Summary:
Migratory male nightingales and blackcaps arrive before females [see Descent 1: 259].
Discusses chaffinch "Peggers".
Disagrees with CD’s opinion that canary mules are fertile.
Display of colour of greenfinches in courtship.
Contributor:
Darwin Correspondence Project