Birds of America
By John James Audubon, F. R. SS. L. & E.
GENUS I.--SURNIA, Dumeril. DAY-OWL.
Bill very short, strong, its upper outline decurved from the base; lower
mandible abruptly rounded, with a sinus on each side. Nostrils elliptical,
rather large. Aperture of ear elliptical, simple, not more than half the height
of the head. Feet strong; tarsi very short or of moderate length. Plumage
rather dense; facial disks incomplete above. Wings very large, the third quill
longest, the first with the filaments thickened and a little free, but scarcely
recurved at the end. Tail varying in length.