Hairy Monster by Genkicoll

Hairy Monsters, though rarely seen, can be found in forests worldwide.

They are shy creatures where mankind is concerned, but extremely active and outgoing with their own kind. These feisty creatures are in constant motion, and never seem to stop moving. Even in a zoo setting, no one has ever seen them sleep. They tend to feed on carrion, as their need to move around so much would make it too difficult for them to effectively hunt for themselves.

Because of human encroachment on their natural habitat, hairy monsters sometimes find themselves in human dwellings. Less fearful of children, they tend to hide in a child's closet or under a bed - a difficult feat when they seem incapable of holding still, and one that has often led to discovery. Hairy monsters may find human children much like their own, or it may just be that they are crafty enough to realize that the children will run away immediately, making time for them to make their own escape. Either way, the hairy monsters never stay in human habitations for long.

Many thanks to Ziggy for providing the original gif animations.