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The guano produced by a huge colony of Mexican free-tailed bats in New Mexico, USA, was used as a major source of nitrates for manufacturing gunpowder during the American Civil War.
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There are as many species of fish as all the amphibians, reptiles, birds and mammals put together.
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Polar bears have more problems with overheating than they do with cold. Even in very cold weather, they quickly overheat when they try to run.
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Unlike most other large cats, snow leopards cannot roar.
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Adult giraffes sleep little, if at all - about a half hour in every 24hrs, in 5 minute catnaps!
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Exchanging a kiss is how prairie dogs recognise accepted members of their community.
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