This is a great topic to explore, and I particularly like the way Gary expands from the subject into journalism and sociology. For instance, there's this entry of his:
According to Vance Randolph, this creature is a weird combination of "ghostly dinosaur, an incredible dragon or lizard supposed to walk the roads at night, grab travelers by the throat and suck their blood." Randolph further suggests that the creature was invented after the Civil War "to frighten superstitious Negroes."
Whatever his origin, the jimplicute has kin throughout the Southeast and Mid-west, and numerous hunting parties with baying hounds and impressive arsenals have scoured mountaintops, swamps and isolated farms searching for a misshapen creature that was drinking the blood of dogs, cows and hapless humans. No doubt the Texas "wowzer" is a close relative.
Sightings are not restricted to the mountains and the prairie, either. For example, the "Vampire Monster of Bladenboro" received extensive newspaper coverage in 1954, and an atmosphere of hysteria surrounded this North Carolina coastal community for several weeks. In the final days, over 1,000 armed men scoured the countrysides and swamps looking for "a sleek, black creature with a round head" that was slaughtering dogs, sheep and cattle. When a half-starved bob-cat was shot, many hunters refused to believe they had killed the "vampire monster" and continued the search. However, the killing of domestic animals stopped.