The Thing In White

The miners and log cutters along the Cumberland tread carefully at night. It's said that something haunts the moonlit roads, white form flitting through the trees, always at the corner of your eye....

Another creature from Appalachian folklore, interpreted from a description that is basically limited to "creepy, bestial, and white." It doesn't really have a name, either--it's only ever referred to as "The Thing in White." Or, apparently, "Sheepsquatch."