Seite - 102 - in The Origin of Species

102 ORIGIN OF SPECIES males ; the males of certain hymenopterous insects have been frequently seen by that inimitable observer M. Fabre, fighting for a particular female who sits by, an apparently uncon- cerned beholder of the struggle, and then retires with the conqueror. The war is, perhaps, severest between the males of polygamous animals, and these seem oftenest provided with special weapons. The males of carnivorous animals are already well armed ; though to them and to others, special means of defence may be given through means of sexual selection, as the mane of the lion, and the hooked jaw to the male salmon ; for the shield may be as important for victory, as the sword or spear. Amongst birds, the contest is often of a more peaceful character. All those who have attended to the subject, be- lieve that there is the severest rivalry betwen the males of many species to attract, by singing, the females. The rock- thrush of Guiana, birds of paradise, and some others, congre- gate ; and successive males display with the most elaborate care, and show off in the best manner, their gorgeous plu- mage; they likewise perform strange antics before the fe- males, which, standingby as spectators, at last choose themost attractive partner. Those who have closely attended to birds in confinement well know that they often take individual preferences and dislikes; thus Sir R. Heron has described how a pied peacock was eminently attractive to all his hen birds. I cannot here enter on the 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, dur- ing thousands of generations, the most melodious or beautiful males, according to their standard of beauty, might produce a marked effect. Some well-known 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 on variations occurring at different ages, and transmitted to the males alone or to both sexes at corresponding 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