The most outstanding feature of a lion-tailed macaque is the silver-white mane which surrounds the head from the cheeks down to its chin, so this monkey is called beard ape. Their silver manes help keep off the rain during monsoons, and their cheek pouches allow them to collect a lot of food quickly and avoid predators. In addition, they have opposable thumbs, which aid in foraging as well.

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State some characteristics of tropical rain forest.