Cuckoos are notorious freeloaders, conning other species into rearing their young, often at the expense of the hosts' chicks. But a new study suggests that the parasitic birds are not mere opportunists.
Like thieves who yell "fire" to clear a store before robbing it, cuckoos appear to have evolved hawklike plumage patterns and physical traits that temporarily scare potential hosts from their nests so they can lay eggs in them and get other birds to rear them.
Lees meer: Scientific American
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