Kirikori Nui were locust-like Rahi found on Metru Nui and Mata Nui in massive swarms roughly every ten years, devouring all vegetation in sight. It was said that in an age long past, the wings of the Kirikori Nui darkened the skies of Mata Nui and their ringing call could drown out all other sound. Despite their scythe-like jaws and powerful legs, Kirikori Nui avoided confrontation with intelligent beings, bounding incredible distances away from even the slightest of disturbances. The Turaga knew the legends, however, and kept a watchful eye on the skies.
Bionicle: Maze of Shadows (non-canon)