Birds of America
By John James Audubon, F. R. SS. L. & E.
GENUS VI.--BUBO, Cuvier. HORNED-OWL.
Bill short, stout, broader than high at the base, compressed toward the
end; upper mandible with its dorsal line curved from the base, the edges with a
slight festoon, the tip trigonal, very acute; lower mandible with the dorsal
line convex, the tip obliquely truncate. Nostrils broadly elliptical, aperture
of ear elliptical, less than half the height of the head, without operculum.
Feet of ordinary length; tarsi and toes feathered. Plumage full and very soft;
facial disks complete; a tuft of elongated feathers on each side of the crown of
the head. Wings ample, the first quill short, the fourth longest. Tail of
ordinary length, rounded.