National Geographic Creativeのインスタグラム(natgeointhefield) - 5月20日 22時29分

These drowsy tree-dwellers #sleep up to twenty hours a day! And even when they are awake, they barely move at all. Some scientists think #sloths developed their slow-motion lifestyle so they would be less noticeable to predators such as hawks and cats, which rely heavily on their eyesight when hunting. Photo by @Joel Sartore. #funfact #wildlife #animalfacts

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