"George Clooney effect": some birds attract females, males with gray plumage

You may have seen the birds is not quite usual for them gray - sparrows, crows and blackbirds. Or those, half feathers which is almost white, and the other - normal "natural" color. This is due to the progressive aging of the birds - the older they become, the more their pale feathers. But what is interesting - "mature" coloring makes males more attractive to these types of females of their own species.

For example, females prefer to mate blackbird with a more experienced partner, and therefore tend to prefer males with white feathers younger black boyfriend. Do thrushes graying is the same as in humans - every year more and more feathers are gray and they eventually turn white completely. The older and whiter than the male, so it is more attractive to females.

via factroom.ru