270 
SCOPS ASIO. 
Members of this genus are not large but the plumage is long and downy. The eyes are quite large and yellow in color. 
The sterno-trachealis is stout, and there is a slender bronchialis, but no other laryngeal muscles. As in other Owls, the 
tympaniform membrane is present and although there is a thin os transversale it does not support a semilunar membrane. 
The cesophagus is nearly straight, being a little wider in the middle, and opens into a quite large proventriculus with thin 
walls and simple, oval glands arranged in a wide zonular band which .measures ’70, in asio, from which this and the fol¬ 
lowing dimensions are taken; it is, however, encroached upon on the lower side by a scallop, '15 in depth. The stomach is 
of medium size, flat in form, with somewhat irregular outlines, and with thick, but soft, walls. The fold of the duodenum 
is not long, inclosing a narrow, irregularly formed, pancreas which extends its entire length. The coeca are quite long, 2-‘25 
in length, small near the intestine, measuring '07 in diameter, with the blind ends dilated into balloon-shaped sacs, ; 15 in 
diameter. The spleen is an elliptical body lying directly on the proventriculus. Both lobes of the liver are nearly equal in 
size. There is but one species within our limits. 
SCOPS ASIO. 
Mottled Owl. 
Scops asio Bon., Geog. and Comp. List; 1838, 6. 
Scops McCallii Cassin, Birds of Cal. and Texas, I; 1854, 180. 
DESCRIPTION. 
Sp. Ch. Form, short and compact. Size, medium. Sternum, not stout. The marginal indentations are quite deep. 
Tongue, rather thick and fleshy, horny at the tip which is,rounded and slightly bifid. Ear tufts, long. Bill and claws, not 
very long. 
Red stage. 
Color. Adult. Above, including upper wing and tail coverts, uniform yellowish-red, with a narrow central line of 
dark-brown on every feather. One half of the outer feathers of the scapularies and wing coverts are white, forming lines. 
Wings, yellowish-red, with the central portion of the feathers dusky, but becoming lighter on the outer edge, and barred 
with dusky which is tinged with reddish on the outer webs. Tail,yellowish-red, barred with dusky. Face, yellowish and 
white, mixed ^ with the former color predominating around the eye and the latter on the sides of the bill and in a line to the 
ear tufts, which are red. Line on sides of face, dark-brown. Beneath, white, with each feather, excepting on the chin, 
throat and abdomen, barred with yellowish-red and centrally lined with dark-brown, but much more widely on the breast. 
Under wing coverts, sulphury-yellow. Under tail coverts, white, with a central stripe of reddish-brown. Tibia and tar¬ 
sus, yellowish, often mottled with a darker shade of the same color. 
Young. Similar to the adult but the red is not as clear and the dark markings are much more prominent, especially 
below. 
Nestlings. Are at first covered with a grayish down, showing traces of red. This gradually becomes reddish-brown 
above, when it is barred with dusky; and it is also barred below with dusky which shows traces of red. There are none of 
the characteristic markings of the adult about the face, where the feathers are barred and mixed with reddish-white and 
dusky. The first growth of wing and tail feathers are retained for a,year. 
Gray stage. 
Color. Adult. Above, mottled, spotted, and mixed with pale-yellowish, white, and dark-brown but the feathers are 
centrally striped with the latter color. Wings and tail, of mixed colors like the back. White markings above as in the red 
stage. Face, white, mixed with dusky. Ear tufts marked like the back and edged with lighter. Beneath, white, mot¬ 
tled, spotted, and barred, excepting on abdomen, with dark-brown and yellowish-rufous, every feather having a central 
stripe of the latter color. Tail, tibia, and tarsus, white, mottled with yellowish. Other markings below and on the head 
as in the red stage. 
Young. Similar to the adult but are not as decidedly gray being somewhat reddish, especially above and the markings 
are broader. 
Nestlings. At first are covered with a whitish down which shows no traces of red but which becomes barred with 
dusky. The first quills of wings and tail are decidedly gray. Iris, yellow, cere, greenish, bill and claws, greenish-yellow, 
in all stages. 
OBSERVATIONS. 
I have described the extremes of the two plumages assumed by these Owls, which are the ones most frequently found but 
I have seen every gradation between the two. These variations appear to be governed by no particular condition of climate, 
