Origin of Species Variorum

→ I 1869 1872

It may appear childish to attribute any effect to such apparently weak means: I 1859 1860 1861 1866

→ details; 1869 1872

to support this view; 1859 1860 1861 1866

→ elegant carriage and beauty 1859 1860 1861 1866 1869

beauty and an elegant carriage 1872

→ OMIT 1869 1872

I strongly suspect that 1859 1860 1861 1866

→ be explained through the action of 1869

be explained on the view of plumage having been chiefly modified by 1859 1860 1861 1866

partly be explained through the action of 1872

↑ 1 blocks not present in 1869 1872; present in 1859 1860 1861 1866

acting when the birds have come to the breeding age or during the breeding season; the modifications thus produced being inherited at corresponding ages or seasons, either by the males alone, or by the males and females; but I have not space here to enter on this subject.

→ by individual males having 1869 1872

individual males have 1859 1860 1861 1866

→ peculiarities 1859 1860 1861 1866 1869

in our domestic animals peculiarities 1872

→ in our domestic animals (as the greater development of the wattle in male carrier-pigeons, horn-like protuberances in certain fowls, &c.), which are in no way useful. 1869

in our domestic animals (as the wattle in male carriers, horn-like protuberances in the cocks of certain fowls, &c.), which we cannot believe to be either useful to the males in battle, or attractive to the females. 1859 1860 1861 1866

which apparently have not been augmented through selection by man. 1872

→ cannot be useful and can 1869

can 1859 1860 1861 1866

→ orna- mental;— 1869

either useful or ornamental to this bird;— 1859 1860 1861 1866

attended to birds in confinement well know that they often take individual preferences and

dislikes;

dislikes:

thus Sir R. Heron has described how

one

pied peacock was eminently attractive to all his hen birds. It may appear childish to attribute any effect to such apparently weak means: →I cannot here enter on the

details

....

necessary →details; but if man can in a short time give →elegant carriage and beauty to his bantams, according to his standard of beauty, I can see no good reason to doubt that female birds, by selecting, during thousands of generations, the most melodious or beautiful males, according to their standard of beauty, might produce a marked effect. →OMIT

some

Some

well-known

laws

laws,

with respect to the plumage of male and female birds, in comparison with the plumage of the young, can →be explained through the action of sexual

selection,

selection

↑ on variations occurring at different ages, and

~~being~~

being

transmitted to the males alone or to both sexes at

corresponding

ages;

age;

but I have not space here to enter on this subject.

Thus it is, as I believe, that when the males and females of any animal have the same general habits of life, but differ in structure, colour, or ornament, such differences have been mainly caused by sexual

selection;

selec- tion;

selection:

that is, →by individual males having had, in successive generations, some slight advantage over other males, in their weapons, means of defence, or

charms,

charms;

which they

and

have

having

transmitted

~~these advantages~~

these advantages

to their male

off-spring.

offspring alone.

offspring.

Yet, I would not wish to attribute all

~~such~~

such

sexual differences to this agency: for we see →peculiarities arising and becoming attached to the male

sex,

sex

→in our domestic animals (as the greater development of the wattle in male carrier-pigeons, horn-like protuberances in certain fowls, &c.), which are in no way useful. We see analogous cases under

nature,

nature,—

for instance, the tuft of hair on the breast of the turkey-cock, which →cannot be useful and can hardly be →orna- mental;—