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How birds defend against brood parasites


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Avian brood parasites lay their eggs in the nests of other bird species, forcing the hosts to do the hard work of raising the unrelated young. A team of scientists wanted to simulate the task of piercing an egg - a tactic that only a minority of host birds use to help grasp and eject the foreign eggs. Their study offers insight into some of the physical challenges the discriminating host birds face.http://feeds.feedburner.com/~r/sciencedaily/plants_animals/birds/~4/74qeCL92T08

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