Penguins have a gland above their eye that turns saltwater into freshwater.
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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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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
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Rattlesnake mating sessions have been known to last more than 22 hours.
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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 sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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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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