Piggy-Back Ride

Twin pygmy marmosets ride on their father's back on exhibit at the Bronx Zoo (link to www.bronxzoo.com).

The babies, born in November, are only about the size of a fifty cent piece, fluff included. In the wild, pygmy marmosets are found in rainforests in Brazil, Colombia, Ecuador and Peru.

Their strong claws make them particularly well-adapted to living high in forest canopies, where they feed on fruit and insects.

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• Images: Endangered and Threatened Wildlife