The Secret Life of Birds
The Infinite Monkey Cage
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The Battle of the Sexes
There's fewer eggs in the world than sperm, and so you would want the best sperm to reach yor egg co. This was one of the explanations for why female seek extto pair matings. But studies have now found that they don't live any longer after mating with an extra male. Which is really disappointed because that was our best explanation for why females engaged in these extra pair matics.
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