Here is a list of mythical creatures beginning with this letter and I am constantly gathering information from each continent and continually updating.
Augerino (American)
The augerino is a legendary creature present in the folk tales of lumberjack and ranching communities in the western United States. Tales of the augerino described it as a subterranean creature which inhabited the drier regions of Colorado. The augerino required a dry environment to survive and would bore holes in dams and irrigation ditches to let the water drain out.
Some accounts described the augerino as a type of worm, though tales differ on the exact physical description of the creature. The name appears to derive from the diminutive of the common hand tool, the auger. The Augerino also enjoys his underground life in other Western states, as long as it is dry. Because the Augerino is fond of dry conditions, he tends to attack waterways and destroy dams and irrigation ditches , boring holes in them to release the water.