Summary

Extensive notes on Madeiran birds: when and where seen on the island and under what conditions.

Summary

Proportions of sexes in birds as reported by bird-catchers.

Summary

Replies to CD’s questions on sexual differences in birds.

Summary

Reports on the behaviour of the Peruvian cow bird, Molothrus, which lays its eggs in other birds’ nests.

Summary

Thanks CD for a recent letter.

Reports on his health, which has been bad for 12 months.

Sends extracts of works on domestication.

Discusses the pairing of various birds; comments on the pugnacity of partridges, pheasants, male guinea-fowl, and peacocks.

Gives proportions of sexes in pheasants.

Summary

Shot a sandpiper in Norway, the hind toe of which was clasped by a freshwater bivalve.

Sends replies to CD’s queries about sex ratios in humming-birds.

Summary

Sends bird specimens for examination by TCE [for Birds].

Summary

MS of a paper called "Comments on Mr Darwin’s grand theory", which generally supports CD but proposes that present flightless birds are primitive. Paper supplemented by a diagram showing the phylogeny of birds.

Summary

Has been working hard on collecting English and foreign birds. Yarrell has written of new birds discovered in England.

News of work in progress by Leonard Jenyns, P. J. Selby, and John Gould.

Cautions CD to beware of insects when he sends any birds’ skins – otherwise there will be only feathers, beaks, and legs remaining when he returns.

Summary

Pairing habits of birds: polygamy among ducks and canaries.

Information on the proportion of sexes in fowls and other birds.

Summary

Wishes CD could publish Origin with footnotes.

Increases in bird populations: starlings are increasing, but AN cannot give reason; mistletoe-thrush increasing but not ousting song-thrush. Doubts trustworthiness of [George?] Edwards, CD’s authority in Origin on this matter [see Origin, 6th ed., p. 59].

AN opposed to bird protection legislation to prohibit egging. Argues egging does not decrease number of birds.

Summary

Encloses memorandum on Origin [1866]

discussing mimicry in mammals and birds,

abnormal habits shown by birds,

behaviour of cuckoos,

and analogies existing between mammals of the same geographical region.

Speculates on possible lines of development linking groups of mammals.

[CD’s notes on the verso of the letter are for his reply.]

Summary

Detailed notes on secondary sexual differences in various species of birds and mammals.

Summary

Comments on ARW’s view of colouring in relation to sexual selection and protection. It is not new to CD. Hopes to discuss subject fully in his "Essay on Man" [Descent]. As to the problem of brightly coloured females, CD is not satisfied that it is due to males taking over incubation. Admires "value and beauty" of ARW’s generalisations.

Summary

Encloses "notes for Mr. D" [see 1818] and a memorandum on the wild cattle of southern India [see 1819].

Breeds of silky fowl of China and Malaya. Black-skinned fowl.

Doubts any breed of canary has siskin blood; all remain true to their type.

Wild canary and finch hybrids.

Hybrids between one- and two-humped camels.

Does not regard zebra markings on asses as an indication of interbreeding but as one of the many instances of markings in the young which more or less disappear in the adult.

Crossing of Coracias species at the edges of their ranges.

Regional variations and intergrading between species of pigeons.

Regards the differences in Treron as specific [see Natural selection, p. 115 n. 1].

Gives other instances of representative species or races differing only in certain details of colouring.

Summary

Alexander Beatson mentions a bird in considerable numbers on St Helena which appears to contradict CD’s statement in Journal of researches that only introduced land birds exist there.

The Azores flora and fauna tell heavily against Atlantis joining them with America and against transoceanic migration from America.

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.

Summary

Thanks for information about the dotterel.

CD had ascertained by dissection that the female of the carrion-hawk of the Falkland Islands is very much brighter coloured than the male. Has inquired about its nidification. Mentions other instances of female birds that are brighter and more beautiful than the males and suggests causes for this anomaly.

Summary

Discusses further his theory relating to the soaring capacity of birds.

Mentions hybrids produced by various crossings of game-birds.

Summary

Thanks PLS for list of Galapagos birds.

Mentions note he will add to Journal [of researches (1860)]

and correction he will make in Origin [3d ed. (1861)].

Asks PLS about variability in "abnormal parts of birds".