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See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1861
1866
1869

→ with the most elaborate care, and show off in the best manner their 1872
their 1859 1860 1861 1866 1869
↑ 1 blocks not present in 1859 1860 1861 1866 1872; present in 1869
It may appear childish to attribute any effect to such apparently weak means:
→ 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
→ beauty and an elegant carriage 1872
elegant carriage and beauty 1859 1860 1861 1866 1869
→ OMIT 1869 1872
I strongly suspect that 1859 1860 1861 1866
→ partly be explained through the action of 1872
be explained on the view of plumage having been chiefly modified by 1859 1860 1861 1866
be explained through the action of 1869
→ by individual males having 1869 1872
individual males have 1859 1860 1861 1866
→ in our domestic animals peculiarities 1872
peculiarities 1859 1860 1861 1866 1869
→ which apparently have not been augmented through selection by man. 1872
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
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
→ Selection , or the Survival of the Fittest. 1872
Selection .— 1859
Selection. — 1860 1861
Selection. 1866
Selection, or the Survival of the Fittest. 1869
All those who have attended to the subject, believe that there is the severest rivalry between the males of many species to
attract
attract,
by
singing
singing,
the females. The rock-thrush of Guiana, birds of
Paradise,
paradise,
and some others, congregate; and successive males display →with the most elaborate care, and show off in the best manner their gorgeous
plumage
plumage;
and
they likewise
perform strange antics before the females,
which
which,
standing by as spectators, at last choose the most attractive partner. Those who have closely attended to birds in confinement well know that they often take individual preferences and
dislikes:
dislikes;
thus Sir R. Heron has described how
one
a
pied peacock was eminently attractive to all his hen birds. ↑ →I cannot here enter on the
details
....
necessary →details; but if man can in a short time give →beauty and an elegant carriage 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 →partly be explained through the action of sexual
selection,
selection
on variations occurring at different ages, and
being
....
transmitted to the males alone or to both sexes at
a
....
corresponding
age;
ages;
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,
and
which they
having
have
transmitted
these advantages
....
to their male
offspring.
off-spring.
offspring alone.
Yet, I would not wish to attribute all
such
....
sexual differences to this agency: for we see →in our domestic animals peculiarities arising and becoming attached to the male
sex
sex,
→which apparently have not been augmented through selection by man. The tuft of hair on the breast of the wild turkey-cock cannot be of any use, and it is doubtful whether it can be ornamental in the eyes of the female bird;— indeed, had the tuft appeared under domestication, it would have been called a monstrosity.
Illustrations
Illustrations
of
of
the
the
action
Action
of
of
Natural
Natural
→ Selection , or the Survival of the Fittest.
In order to make it clear how, as I believe, natural selection acts, I must beg permission to give one or two imaginary illustrations. Let us take the case of a wolf, which preys on various animals, securing some by
cralt,
craft,
some by strength, and some by fleetness;