 The pygmy three @-@ toed sloth is significantly smaller than the other members of its genus , but otherwise resembles the brown @-@ throated sloth . According to Anderson and Handley Jr . , the head @-@ and @-@ body length is between 48 and 53 centimetres ( 19 and 21 in ) , and the body mass ranges from 2 @.@ 5 to 3 @.@ 5 kg ( 5 @.@ 5 to 7 @.@ 7 lb ) . The brown @-@ throated sloth is nearly 40 % heavier and 15 % smaller in head @-@ and @-@ body length than the pygmy three @-@ toed sloth . Moreover , the brown @-@ throated sloth is lighter on the crown . The face is buff to tan ; a dark band runs across the brow , surrounded by an orange patch . The throat is gray to brown , lighter than the underbelly ; the dark brown back is spotted and has a dark stripe along the midline . Facial hair is short , while the long , rough hair on the crown and shoulders forms a hood . The grayish limbs have three claws each . The tail is 4 @.@ 5 to 6 centimetres ( 1 @.@ 8 to 2 @.@ 4 in ) long . 
