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Dawn Sneaks: Old birds sing early, cuckold sleepyheads

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9:57am, July 5, 2006

Among European birds called blue tits, the early bird gets more than a worm.

Older males start singing some 5 or 6 minutes earlier in the dawn chorus and attract more of the promiscuous females than younger males do, researchers report in the September issue of Animal Behaviour.

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