Discusses beaks and relative numbers of the sexes of goldfinches.
Comments on sexual selection among butterflies.
Mentions Kerguelen moth collected by Hooker.
Comments on JJW’s observations on coloured birds.
Showing 1–13 of 13 items
Discusses beaks and relative numbers of the sexes of goldfinches.
Comments on sexual selection among butterflies.
Mentions Kerguelen moth collected by Hooker.
Comments on JJW’s observations on coloured birds.
Thanks for facts about birds displaying plumage during courtship; "for Butterflies I must trust to analogy altogether in regard to sexual selection".
Invites JJW to visit in summer.
Glad to hear about pigeons. Did not know some birds could win affections of females more than others, except among peacocks.
Comments on polygamy in birds.
Discusses sex ratios among birds.
Thanks for information [about sex ratios] received from bird-catchers.
"Can you form any theory about all the many cases which you have given me and others which have been published, of when one pair is killed, another soon appearing?"
Facts about gay-coloured caterpillars very satisfactory.
Comments on Pangenesis.
Aggressive behaviour of a bullfinch toward new arrival in JJW’s aviary.
Sexual differences in goldfinches: size of beaks.
Sexual selection in Lepidoptera.
Thinks Dr Alex Wallace’s observations on Bombyx not conclusive in proving that no preference is shown by females.
Does not think females give preference to any males. Coloration, pugnacity; cases of use of colour in struggle for existence. [see Descent 1: 395.]
Various facts about birds: pairing, finding new mates, protective coloration, polygamy, sexual differences.
Courtship of goldfinches. Male display. [See Descent 2: 95.]
Sexual selection of pigeons, ducks;
polygamous birds.
Relates a variety of facts about sexual selection in birds. [See Descent 2: 104–5.]
Experiments to test Wallace’s theory that brightly coloured caterpillars are rejected by birds. [See Descent 1: 417.]
Proportions of sexes in birds as reported by bird-catchers.
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.