From J. J. Weir 14 August 1872
Accountant and Controller General’s Office, | H. M. Customs.
14th August 1872
My Dear Sir
I have thrown together an observation or two which may prove amusing, but I trust you will not deem it worth while even to acknowledge the receipt of this communication.—
I have had a further illustration in my aviary of the objection male birds entertain towards any others, which in the nuptial plumage, are colored in the same manner.—as themselves.1
The Spiza cyanea is in the breeding plumage a beautiful blue bird, The Spiza ciris has this color confined to the head only.—2
My Spiza cyanea, generally a very quiet bird, attacked the Spiza ciris, & completely scalped his blue head.—3
The Ciris however survived although it appears the skull is exposed, he even resumed his song after a few days, & afterwards remained unmolested
I was at the Zoological Gardens several days lately, & saw what I believe you are aware of, six young of the New Zealand Shelldrake, Tadorna Variegata,4 these all had the black head of the male bird, & were in all respects similar, they are however at this time beginning, at least the
CD annotations
Footnotes
Bibliography
Correspondence: The correspondence of Charles Darwin. Edited by Frederick Burkhardt et al. 29 vols to date. Cambridge: Cambridge University Press. 1985–.
Descent 2d ed.: The descent of man, and selection in relation to sex. By Charles Darwin. 2d edition. London: John Murray. 1874.
Summary
Hostility of birds toward others with same colour;
nuptial plumage.
Spiza cyanea and Spiza ciris.
Letter details
- Letter no.
- DCP-LETT-8470
- From
- John Jenner Weir
- To
- Charles Robert Darwin
- Sent from
- H.M. Customs
- Source of text
- DAR 88: 177–8
- Physical description
- inc †
Please cite as
Darwin Correspondence Project, “Letter no. 8470,” accessed on 6 May 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-8470.xml
Also published in The Correspondence of Charles Darwin, vol. 20