Varies across a wide range, but always note white-and-black speckling on the upperparts, beautiful gray-and-tawny wings, and large round head. Color of the facial disc and underparts varies from pure white to rusty orange. Hunts in open areas by night, foraging with a slow and buoyant flight. Roosts in old buildings, tree hollows, caves, and nest boxes by day. Gives a bone-chilling, rising shriek, as well as shorter rasping calls and insect-like clicks.