When dragonflies mate, their tails form a love heart.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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Whales and dolphins can't taste anything other than salt.
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In the movie 'The Wizard Of Oz', Toto the dog's salary was $125 a week, while Judy Garland’s was $500 a week.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
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