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A howler monkey infant clings to its mother's back in a forest.
A howler monkey infant clings to its mother's back in a forest.
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A Bonobo monkey looks around its enclosure at the San Diego Zoo.
A Bonobo monkey looks around its enclosure at the San Diego Zoo.
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Monkeys sit together on a high, leafy branch.
Monkeys sit together on a high, leafy branch.
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A monkey forages for food among dense vegetation.
A monkey forages for food among dense vegetation.