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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Cockroaches can live for 9 days after their head has been cut off.
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In Brazil, there's a species of cockroach that eats eyelashes, usually those of young children while they are asleep.
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