The ancestor of all domestic cats is the African Wild Cat which still exists today.
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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
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The elephant shrew’s closest relative isn’t a shrew — it’s actually an elephant
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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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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