V. SUB-FAMILY NYCTEININÆ. THE DAY OWLS.
Head moderate, without ear-tufts; wings rather long, wide; tail rather long, ample; tarsi strong, and with the toes densely covered with hair-like feathers; claws strong, sharp; plumage very thick and compact. This sub-family includes only the two species now about to be described, both of which are common to the Arctic regions of America, Europe, and Asia, migrating southward in the winter. They are the least nocturnal of all the birds of this family.
I. GENUS NYCTEA. Stephens, Cont. of Shaw’s Gen. Zool., XIII. p. 62. (1826.)
Size large; head large, without ear-tufts; no facial disc; bill short, very strong, nearly concealed by projecting feathers; wings long, wide, third quill longest; tail moderate or rather long, broad; legs short, and with the toes densely covered with feathers, almost concealing the claws, which are long, curved, and strong; general form compact and robust, and thickly feathered. This genus contains only the species described below.
Nyctea nivea. (Daudin.) The Snowy Owl. The White Owl. Strix nivea. Daudin, Traité d’Orn., II. p. 190. (1800.) Strix nyctea. Linn., Syst. Nat., I. p. 132. (1766.) Strix candida. Lath., Ind. Orn., Supp., p. 14. (1801.) Strix erminea. Shaw, Gen. Zool., VII. p. 251. (1809.) Strix arctica. Bartram, Trav., p. 289 (1791, but not of Sparrman, 1789.)
Large; eyes large; bill nearly concealed by projecting feathers; tarsi and toes densely covered with hair-like feathers, nearly concealing the claws. Adult. Entire plumage white, in some specimens with a few spots only on the upper parts of dark brown, and on the under parts with a few irregular transverse bars of the same; quills and tail with a few spots or traces of bands of dark brown. In other specimens every feather except on the face and neck before, is distinctly banded transversely with brown, and in some specimens that color predominates on the upper parts; quills and tail with regular transverse bands of dark brown; plumage of the legs and feet pure white; bill and claws dark horn-color; irides yellow.
Dimensions. Female.—Total length, 24 to 26 inches; wing, 17; tail, 10 inches. Male, smaller.
Hab. Northern North America. Northern Europe and Asia. Greenland (Prof. Holboll); Hudson’s Bay (Mr. Hearne); Canada (Dr. Hall); Vermont (Mr. Thompson); Oregon (Dr. Townsend); Kamschatka (Pallas); Ohio (Prof. Kirtland); South Carolina, Kentucky (Audubon); Bermuda (Sir W. Jardine). Spec. in Mus. Acad., Philada.
Obs. This large and handsome Owl is abundant in the Arctic regions of America, and has been observed at the highest northern latitude yet reached by voyagers. In the winter, it migrates southward over the greater part of Asia, Europe, and North America. It is to be met with every winter in the Northern and Middle States of the Union, though greatly varying in numbers in different years. We have known it to be so abundant in Pennsylvania and New Jersey, as to be brought commonly by the farmers to the market in Philadelphia, and sold for a trifle.
According to Dr. Hall, this fine species breeds in the vicinity of Montreal, making its nest on the ground. Mr. Audubon’s plate represents this bird unusually dark.
II. GENUS SURNIA. Dumeril, Zoologie Analytique, p. 34. (1806).
Size medium or small; head moderate, without ear-tufts; facial disc obsolete; bill moderate, strongly curved, with projecting plumes at base; wings long, third quill longest; tail long, graduated, broad; legs short, and with the toes densely feathered. General form rather lengthened, but moderately robust. This genus includes the Hawk Owl of the Arctic regions and two other species of South Africa.