Birds have clever solution for a cuckoo conundrum

By Sarah Zielinski, 12:43 PM May 9, 2014

Like a lot of birds, superb fairy wrens of Australia have a problem: Cuckoos lay their eggs in the fairy wrens’ nests. This is called brood parasitism, and it’s how cuckoos manage to have their baby birds raised well without any effort on their part. They leave the messy parts of parenthood to other birds.

Those other birds, though, don’t want to spend their time and effort raising someone else’s kid, especially when that kid might push out the chicks that actually belong in the nest. But the ...

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