Monkeys are among our favourite animals, with their comical antics and sometimes human-like behaviour. But some of our closest relatives are at risk of extinction, facing threats from human activities. As their populations decrease, they are placed in even greater danger because they are at risk of inbreeding or the chance of a natural disaster causing total extinction. These 10 species are among the most critically endangered monkeys on Earth, and will need serious conservation action to save them.

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