From J. J. Weir [4–7] May 1868
Summary
Proportion of sexes in ruffs [see Descent 1: 306].
Colour display in linnets, songbirds. Courtship display of Australian pigeon at zoo.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | [4–7] May 1868 |
| Classmark: | DAR 84.1: 75–6, DAR 86: C3–4 |
| Letter no: | DCP-LETT-6151 |
From J. J. Weir [14 April 1868]
Summary
Starlings find new mates readily. Nesting in threes common.
Recognition of song by birds.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | [14 Apr 1868] |
| Classmark: | DAR 84.1: 88–9 |
| Letter no: | DCP-LETT-6152 |
From J. J. Weir 18 May 1868
Summary
Answers CD’s question on whether any female birds regularly sing.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 18 May 1868 |
| Classmark: | DAR 84.1: 81–2, DAR 86: A37–8 |
| Letter no: | DCP-LETT-6181 |
From J. J. Weir 3 June 1868
Summary
Plumage of canaries; changes in plumage with successive moults.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 3 June 1868 |
| Classmark: | DAR 181: 78 |
| Letter no: | DCP-LETT-6226 |
From J. J. Weir [before 18 June 1868]
Summary
Coloration of linnets.
Sexual behaviour of black hen bullfinch.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | [before 18 June 1868] |
| Classmark: | DAR 84.1: 141–2 |
| Letter no: | DCP-LETT-6249 |
From J. J. Weir [before 17] October 1868
Summary
Both sexes of Crossoptilon auritum (eared pheasant) obtained the red cheeks the first year.
Coloration of the linnet.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | [before 17] Oct 1868 |
| Classmark: | DAR 86: A36, 53; DAR 84.1: 139 |
| Letter no: | DCP-LETT-6421 |
From J. J. Weir [1–13] May 1869
Summary
South Down sheep: variability in colouring and patterning of lambs compared with constancy of adult coat.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | [1–13] May 1869 |
| Classmark: | DAR 181: 79 |
| Letter no: | DCP-LETT-6723 |
From J. J. Weir 26 May 1869
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.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 26 May 1869 |
| Classmark: | DAR 86: A52a-c, DAR 84.1: 143 |
| Letter no: | DCP-LETT-6758 |
From J. J. Weir June 1869
Summary
Loss of juvenile colouring in South Down sheep.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | June 1869 |
| Classmark: | DAR 181: 80 |
| Letter no: | DCP-LETT-6763 |
From John Jenner Weir 17 March 1870
Summary
Describes the unusual appearance of a horse whose mother had previously borne a foal by a quagga. The effect of one mating on the subsequent pregnancy of another mating is explained by JJW using Pangenesis.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 17 Mar 1870 |
| Classmark: | DAR 181: 81 |
| Letter no: | DCP-LETT-7137 |
From J. J. Weir 27 June 1870
Summary
On behaviour of birds when frightened and when threatening.
Purple Cytisus grafted onto yellow stock produces some yellow flowers.
Mutations in rabbits.
Cites case of variegated leaf form of one plant apparently spreading to a neighbour.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 27 June 1870 |
| Classmark: | DAR 181: 82 |
| Letter no: | DCP-LETT-7247 |
From J. J. Weir 4 July 1870
Summary
On mutations in rabbits.
Cytisus case is not a double graft.
Aggressive behaviour of birds of prey.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 4 July 1870 |
| Classmark: | DAR 181: 83 |
| Letter no: | DCP-LETT-7264 |
From J. J. Weir 31 July 1872
Summary
On variegated leaves; a feature not inherited consistently.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 31 July 1872 |
| Classmark: | DAR 181: 84 |
| Letter no: | DCP-LETT-8440 |
From J. J. Weir 14 August 1872
Summary
Hostility of birds toward others with same colour;
nuptial plumage.
Spiza cyanea and Spiza ciris.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 14 Aug 1872 |
| Classmark: | DAR 88: 177–8 |
| Letter no: | DCP-LETT-8470 |
From J. J. Weir 13 November 1873
Summary
Hybrid Motacilla.
Case of female duck leaving mate to pair with male of another species.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 13 Nov 1873 |
| Classmark: | DAR 88: 179–80 |
| Letter no: | DCP-LETT-9139 |
