This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Hidebehind (United States)
The Hidebehind is a nocturnal fearsome critter from American folklore that preys upon humans that wander the woods, and was blamed for the disappearances of early loggers when they failed to return to camp. As its name suggests, the Hidebehind is said to be able to conceal itself. When an observer attempts to look directly at it, the creature quickly hides behind an object or behind the observer and therefore cannot be directly seen.
The Hidebehind supposedly uses this ability to stalk human prey without being observed and to attack them without warning. Said victims, including lumberjacks and others who frequent the forests, are then dragged back to the creature's lair to be devoured. The creature subsists chiefly upon the intestines of its victim and has a severe aversion to alcohol, which is therefore considered a sufficient repellent.