CHRIS GALLAGHER / SCIENCE PHOTO LIBRARY CHRIS GALLAGHER / SCIENCE PHOTO LIBRARY
Hoffmann's Two-toed Sloth, Choloepus hoffmanni, here found in the Monteverde Rainforest of Costa Rica. It is a solitary nocturnal and arboreal animal, found in mature and secondary rainforests and deciduous forests, and it mainly lives in Cecropia trees. The name of this animal commemorates the German naturalist Karl Hoffmann. These mammals belong to the families Megalonychidae and Bradypodidae, part of the order Pilosa. Sloths have made extraordinary adaptations to an arboreal browsing lifestyle. Leaves, their main food source, provide very little energy or nutrition and do not digest easily: sloths have very large, specialized, slow-acting stomachs with multiple compartments in which symbiotic bacteria break down the tough leaves.
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