Swift Peter
Region of origin: Mississippi
Rarely offering witnesses a clear sighting due to the speed that gave it its name, physical descriptions of Swift Peter have ranged from a red wolf to a half-fish beast to a winged mothman-like figure, but regardless of form the creature is associated with the particular habit of brutally attacking dogs and other pets in the region, carrying them off to feed or leaving them badly wounded or dead before taking back off into the brush when pursued. Peter has been a folk tale through the twentieth century, but sightings have persisted into the present day, with a reported sighting and supposed tracks found in 2013.
The Compendium of Arcane Beasts and Critters 