A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
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Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
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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 group of kittens is called a "kindle".
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