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Slow loris monkeys have poisonous elbows
Slow loris monkeys have poisonous elbows
WARMER/SHUTTERSTOCK

The doe-eyed slow loris is a popular exotic pet, but these little furballs are one of the only poisonous mammals in the world. Normally no more than 38cm long, slow lorises produce a toxic secretion from the brachial gland in the upper arm that can cause a severe allergic reaction in other mammals. When threatened, the creatures lick the secretion and bite the predator, delivering the poison into the wound.