The Secret Life of Birds
The Infinite Monkey Cage
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Penguins Are a Paragon of Virtue
Most birds are what we call now socially monogamous, which means that they breed as pairs. So in gillemots, for example, a about seven % of offspring a fathered by the thap next door. But in blue tits that you might have breed i inyou garden, it could be 12% In reed buntings, it's about 70%. And nobody really, really understands why females go for this.
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