Females can place limits on evolution of attractive features in males, research shows

[ScienceDaily: Biology]

Female cognitive ability can limit how melodious or handsome males become over evolutionary time, biologists have observed. Males across the animal world have evolved elaborate traits to attract females, from huge peacock tails to complex bird songs and frog calls. But what keeps them from getting more colorful feathers, longer tails, or more melodious songs?

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