Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
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When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
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Parrot parents "name" their children with a signature call.
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If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
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