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Older males out-compete young males when it comes to extra-marital breeding - EurekAlert

<p>Young male blue tits are less successful in fathering offspring outside their breeding pair, not because of a lack of experience, but because they are outcompeted by older males, Bart Kempenaers and colleagues from the Max Planck Institute for Biological Intelligence in Germany report in a study publishing April 16^th in the open-access journal <em>PLOS Biology</em>.</p>

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