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A peacock spreading his tail, displaying his plumage Peahen. Peafowl is a common name for two bird species of the genus Pavo and one species of the closely related genus Afropavo within the tribe Pavonini of the family Phasianidae (the pheasants and their allies). Male peafowl are referred to as peacocks, and female peafowl are referred to as ...
The peacock's plumage shows intersexual selection, where ornate males compete to be chosen by females. The result is a stunning feathered display, which is large and unwieldy enough to pose a significant survival disadvantage, demonstrating the handicap principle , and possibly provide a means of demonstrating body symmetry, such that peahens ...
Indian peacocks were frequently used in European heraldry with the peacocks most often depicted as facing the viewer and with the tails displayed. In this pose, the peacock is referred to as being "in his pride". Peacock tails, in isolation from the rest of the bird, are rare in British heraldry, but are used frequently in German systems. [99]
A male peacock’s train plumage, on the other hand, is spectacular! Wooing His Mate The most eye-catching parts of the train plumage are the ocelli or ‘eyespots’.
If runaway selection is strong enough, it may incur significant costs, such as increased visibility to predators and energetic costs to maintain the trait's full expression; hence peacocks' extravagant feathers, or any number of lek mating displays. This model does not predict a genetic benefit; rather, the reward is more mates.
Sexual selection creates colourful differences between sexes in Goldie's bird-of-paradise.Male above; female below. Painting by John Gerrard Keulemans.. Sexual selection is a mechanism of evolution in which members of one biological sex choose mates of the other sex to mate with (intersexual selection), and compete with members of the same sex for access to members of the opposite sex ...
With its colorful display and mesmerizing moves, the peacock spider is like a tiny, fuzzy disco ball. But believe it or not, the hilarious dance you’ll see in this video is actually serious ...
In some species, the males at the leks show a high degree of relatedness, but this does not apply as a rule to lek-forming species in general. [58] [59] [60] In a few species such as peacocks and black grouse, leks are composed of brothers and half-brothers. The lower-ranking males gain some fitness benefit by passing their genes on through ...