A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
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When dragonflies mate, their tails form a love heart.
22
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6
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.
402
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12