Keep in mind, many theories exist about the Jersey Devil’s loyalties. It is hard to tell if it is a physical creature, or an entity from someplace dark. One thing that baffles the science community, is the reports of people seeing a full-moon on the same day that somebody supposedly witnesses the Jersey Devil.
Almost every confirmed witness-story mentions the moon at some point. The connection theory supposedly started the night of Marie Clapper’s abduction, when a large group of searchers witnessed a full-moon when such a thing, should not have been visible.