What is "coraniaid"

The Coraniaid are a race of beings from Welsh mythology. They appear in the Middle Welsh prose tale Lludd and Llefelys, which survives in the Mabinogion and inserted into several texts of the Brut y Brenhinedd, a Welsh adaptation of Geoffrey of Monmouth's Historia Regum Britanniae. The Coraniaid figure in the tale as one of three plagues that affect Britain during the reign of King Lludd. They are characterized by a sense of hearing so acute that they can hear any word the wind touches, making action against them impossible.