24.Ostrich, South American,1,24.Ouzel, Water,2,42;portrait,2,42.Oven-bird,2,52.Owl, American Barn,2,185.Owl, Barred,1,101.Owl, Burrowing,2,182.Owl, Florida Burrowing,2,182.Owl, Screech,2,180;portrait,2,180.Owl Family,2,178,204.Owls,1,35;food of,52,53,127;ears of,103;feet of,106;usefulness to man,126,127.Paridæ,2,18,198.Penguin,1,72.Petrel,1,110.Pewee, Western Wood,2,142.Pewee, Wood,1,47;2,136,140.Phainopepla,2,67.Phœbe,1,35;2,136.Picidæ,2,160,203.Pigeons,1,79,80.Pipit, Sprague's,2,46;portrait,2,46.Pipits,2,46,199.Plumage, the nestling,1,22,23;coloration of,23,24,27,28;moulting,25,26,118;change of color without moulting,26,27,118-120;protective coloration of,120,121;recognition marks in,121,122.Poor-will,2,157.Protection and attraction of birds,1,131-135.Quail (bob-white),1,44,59.Redbird,2,88.Redstart, American,1,14;portrait,1,14.Regurgitation,1,18,19.Rhea,1,24.Robin, American, arrival,1,3,10,10,17,17,21;plumage of young,23,23;teaching young to bathe,38,38;notes of,44,44;food of,49,49,127;roosting in flocks,60;devotion to young,78;story of the intelligence of a,84,84;usefulness to men,126,126,129;2,5,6,38,65,167;portrait,2,60.Robin, Western,2,6.Sapsucker, Yellow-bellied,1,85.Sapsuckers, tail of,1,113;2,161.Scavenger Family,2,194,204.Shrike, Loggerhead,2,59;portrait,2,60.Shrike Family,2,59,200.Shrikes,1,126.Skylark, Missouri,2,46.Skylark, Prairie,2,46.Sleeping,1,57-60.Song,1,14,14-47.Sparrow, Chipping,1,54.Sparrow, English, learning canary's song,1,46;young fed by a wren,81,82;harmfulness of,126,130,132;2,32.Sparrow, Song, arrival,1,3;nest,9;individuality in songs,45,47;2,81.Sparrow, Tree,1,58,128.Sparrow, White-throated,1,54.Sparrow and Finch Family,2,80,201.Sparrows,1,84,97;2,80.Starlings, Meadow,2,100.Stomach,1,93.Strigidæ,2,185,204.Swallow, Bank,1,96.Swallow, Barn,1,71,96;2,69;portrait,frontispiece.Swallow, ClifforEave,1,71;2,72,73.Swallow Family,2,69,201.Swallows, food of,1,17,35,50;flocking,62,71;story of young,75;story showing intelligence,85;wings of,110.Swift, Chimney, sleeping,1,59,60;devotion to young,78;tail of,113;2,150.Swift, Vaux's,2,150,152.Swift Family,2,150,202.Sylviidæ,2,14,197.Tail,1,112,113.Tanager, Louisiana,2,78.Tanager, Scarlet,1,79;2,75;portraits,1,142;2,76.Tanager, Summer,2,78.Tanager Family,2,75,201.Tanagridæ,2,75,201.Thrasher, Arizona,2,41.Thrasher, Brown,1,113;2,40;portrait,112.Thrush, Brown.SeeThrasher, Brown.Thrush, Golden-crowned,2,52.Thrush, Hermit,2,11;portrait,2,10.Thrush, Western Hermit,2,11.Thrush, Wood,1,133.Thrush Family,2,5,197.Thrushes, Mocking,2,34,199.Titlarks,2,46.Titmice,2,22,198.Titmouse, Tufted,2,24.Tongue,1,97,98.Towhee,orChewink,1,76,77;2,84;portrait,1,76.Towhee, Spurred,2,84.Trochilidæ,2,143,202.Troglodytidæ,2,30,199.Turdidæ,2,5,197.Tyrannidæ,2,135,202.Usefulness of birds to man,1,125-130.Veery,1,47.Vireo, Red-eyed,1,47.Vireo, Warbling,2,57.Vireo, Western Warbling,2,57.Vireo, Yellow-throated,2,56,57;portrait,2,56.Vireo Family,2,55,200.Vireonidæ,2,55,200.Vulture, Turkey,orTurkey Buzzard,1,50,51;2,194.Vultures, American,2,194,204.Wagtail Family,2,46,199.Warbler, Black and White,1,121;portrait,1,120.Warbler, Yellow,1,50;2,50.Warbler Family,2,49,200.Warblers,1,62,97.Water, birds in,1,94;for drinking and bathing,133,134.Water-Thrush,2,52.Water-Thrush, Louisiana,2,52.Waxwing, Cedar.SeeCedar-bird.Waxwing Family,2,63,200.Whip-poor-will,1,107,121;2,155.Whip-poor-will, Nuttall's,2,157.Wings,1,109-112.Winter, birds in,1,66-69.Woodcock, beak of,1,96;whistling sound of wings,111.Woodpecker, Californian,2,167.Woodpecker, Downy,1,50;2,169;portrait,2,166.Woodpecker, Golden-winged.SeeFlicker.Woodpecker, Red-headed,1,85;2,165.Woodpecker, Yellow-bellied,1,85.Woodpecker Family,2,160,203.Woodpeckers,1,18,21;teaching young to feed itself,35,36;food of,50;storing food,54,55;sleeping,59,85,86;beaks of,95;tongues of,98,103;feet of,106;tails of,113;2,19.Wren, House,1,81,82;2,31;portrait,1,80.Wren, Western House,2,31.Wrens,2,30,199.Wren-Tits,2,198.Young birds, hatching of,1,13-15;feeding of,16-20;first plumage of,21-23;learning to fly,29-34,37-39;the mother's anxiety about,30-32;learning to feed themselves,34-36,39;learning to sing,36;after leaving the nest,70-73.