PSs.» aceite ae eae 
brown and whitish, the throat alone 
STRIGIDZH, OWLS.—GEN. 145, 146, 147. 205 
145. Genus NYCTEA Stephens. 
Snowy Owl. Pure white, with more or fewer blackish markings. 
Nearly 2 feet long; wing 17 inches; tail 10. Head smooth; facial disks 
incomplete ; eyes and ear parts moder- 
ate ; feet densely clothed. This remark- * 
able owl, conspicuous both in size and 
color, inhabits the boreal regions of both 
continents, coming southward in winter ; 
it ordinarily enters the United States, 
and in extreme cases ranges irregularly 
through most of the States. It is not 
by any means exclusively nocturnal. 
Wirse tv, 05, pl. 32, f. 1; Nurr., 1, 
116; Aup., i, 113, pl. 28; Cass. in Bp., 
63; Coor.,447.. . . . . NIVEA. gl 
146. Genus SURNIA Dumeril. 
Hawk Owl. Day Owl. Dark brown 
above, more or less thickly speckled 
with white; below, closely barred with 
Fig. 138. Snowy Owl. 
streaked; quills and tail with numerous white bars; face ashy, margined 
with black. Length about 16 inches; wing 9; tail 7, graduated, the lateral 
feathers 2 inches shorter than the central. Except in the length of its tail, 
which produces linear measurements unusual for a bird of its bulk in this 
family, its general form is that of the snowy owl. Like that species, it is + 
bird of Arctic regions, coming southward in winter, but its range is more 
restricted, rarely extending to the Middle States. It is the most diurnal 
bird of the family, ranging abroad at all times, and approaches a hawk 
more nearly than any other. Wis., vi, 64, pl..50, & 6; Norr., 1,115; 
Aup., i, 112, pl. 27; Cass. in Bp., 64; Coop., 448. ULULA var. HUDSONICA. 
147. Genus NYCTALE Brehm. 
*.* Small owls with the head untufted, the facial disks complete, the ears opercu- 
late, the tarsus longer than the middle toe, the tail nearly even, the 3d quill longest, 
the first 5 emarginate; color above chocolate-brown, spotted with white, the tail 
with transverse white bars; the adult with the facial area and forehead variegated 
with white, the face and superciliary line grayish-white, the lower parts white with 
spots or streaks of the color of the back; the young with the facial area and fore- 
head dark brown, the face dusky, the eyebrows pure white, the lower parts brown, 
paler on the belly, unmarked. (See Rmeway, Am. Nat. vi, 254.) 
Tengmalm’s Owl. Warge; wing 74; tail 44, thus more than half the 
wing. Bill yellow, the cere not tumid, the nostrils presenting laterally, and 
obliquely oval. Arctic America, south to the borders of the United States. 
