From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
[before 18 June 1868]
Source of text:
DAR 84.1: 141–2
Summary:
Coloration of linnets.
Sexual behaviour of black hen bullfinch.
Contributor:
Darwin Correspondence Project
Coloration of linnets.
Sexual behaviour of black hen bullfinch.
Both sexes of Crossoptilon auritum (eared pheasant) obtained the red cheeks the first year.
Coloration of the linnet.
South Down sheep: variability in colouring and patterning of lambs compared with constancy of adult coat.
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.
Loss of juvenile colouring in South Down sheep.