Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
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Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
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Penguins have a gland above their eye that turns saltwater into freshwater.
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Parrot parents "name" their children with a signature call.
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Mahatma Gandhi used to travel with his goat so that he could have fresh milk.
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Cats sleep for 70% of their lives.
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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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