sentence: Most sloths are about the size of a small dog and they have short, flat heads.
sentences_after: Their hair is grayish brown but, at times they look grey-green in color because they move so slowly that tiny camouflaging algae grow all over their coats. They have hooklike claws on their arms and legs to keep them attached to trees.
concept_name: sloth
headings: Sloth Physical description
categories: Xenarthrans