The yann-an-oed emits an owl-like hoot from a blowhole near the top of its head. Each creature within 120 feet that is able to hear the sound must succeed on a DC 12 Wisdom saving throw or return the hooting sound, if it can make noise. The yann-an-oed is able to unerringly track a creature that responds to its call for 1 hour, even if the creature is hidden by magic or on another plane of existence.