Shriekbats thrive in the cavernous spaces of the Underworld where they face little competition from dragons, rocs, and other large flying creatures, as they would aboveground. Despite their enormousness, the bats deftly maneuver among the stalactites and stalagmites crowding underground caverns. When they attack prey, or in the very rare cases where they must escape predators, they emit a terrible shriek that overwhelms their foes and allows them to easily grab prey or escape. Shriekbat echolocation uses subsonic frequencies, allowing the bats to fly in relative silence.