. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande Valley . Wing 12 to 19. 4. Ear openings snudl. the two ears not distinctly dif-ferent . Nyctea, p. 187. 4. Ear openings very large, the two strikingly ). Toes feathered to claws. Scotiaptex. p. ). Tips of toes exposed . . Syrnium. p. 177. GENUS ASIO. (itiicrdl (Hidniili IS. — Ear openings immense, almost equal to height ofskull; eai- tufts more or hss (hveloped ; wings about twice as long as tail:feet closely feathered to ends of toes. KEY TO ADULTS. 1
. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande Valley . Wing 12 to 19. 4. Ear openings snudl. the two ears not distinctly dif-ferent . Nyctea, p. 187. 4. Ear openings very large, the two strikingly ). Toes feathered to claws. Scotiaptex. p. ). Tips of toes exposed . . Syrnium. p. 177. GENUS ASIO. (itiicrdl (Hidniili IS. — Ear openings immense, almost equal to height ofskull; eai- tufts more or hss (hveloped ; wings about twice as long as tail:feet closely feathered to ends of toes. KEY TO ADULTS. 1. Ear tufts short accipitiinus. j). 177. r. Kar tufts hmg -wilsoiiianus. j). 17.». 366. Asio wilsonianus (Lrs^.). Lon 0\\\.. tufts dark conspicuous; face maiidy yellowish hrowu : undt-rparts whitish and yellowish, with dark l)rown shaft streaks and hori-zontal bars on Ixdly : Hanks yellowish brown, unspotted; upper parts 176 HORNED OWLS, wings and tail barred. Length , tail , bill From Bi<iiui;ual Mir\ry. L. S. Dept. ot 243. Long-eared Owl. mottled gray, tawny, and blackish13-16, Distribution. —Temperate North America,straggling south to Mexico in winter. Breedsthroughout its rang-e. Nest. — Usually an old crows nest built upon the sides and lined with grass, dead leaves,and feathers; generally 10 to oO feet from theground, in bushes or trees in swamps or on bor-ders of streams. Eggs : o to 6, white. Food. — Injurious rodents, which it destroysin vast numbers. The long-eared owl spends its days mostlyin the thickest cover it can find, but whentliis is not dense enough to prevent discov-ery it protects itself by many curious de-vices. It affords one of the interestingcases where unconscious protective color-ation is combined with conscious protec-tive attitudes. When frightened, Dr. Fisher says, it rises up,draws the feathers close to the body and erects the ear tu
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