References to the First Book are indicated by 1; those to the Second Book by 2.

Affections, 1, [78]-[82].
Air-sacs, 1, [92], [94].
Alaudidæ, 2, [131], [202].
Alcedinidæ, 2, [170], [203].
Ampelidæ, 2, [63], [200].
Arrival in spring, 1, [3], [4].
Attraction and Protection of Birds, 1, [131]-[135].
Audubon, John James, 1, [60].
Auks, 1, [110].
Barn Owl Family, 2, [185], [204].
Beak, 1, [95]-[97].
Blackbird, Brewer's, 2, [113].
Blackbird, Crow, 1, [72]; 2, [110].
Blackbird, Red-winged, 2, [94];
portrait, 2, [94].
Blackbird Family, 2, [94], [201].
Blackbirds, 1, [3], [126], [129].
Bluebird, arrival, 1, [3];
getting food for young, [17];
teaching young to fly, [37], [38];
feeding, [50]; 2, [5];
portrait, 1, [38].
Bobolink, nest of, 1, [9];
one of the first birds to stop singing in summer, [47];
the fall migration, [61], [62].
Bob-white (quail), 1, [44], [59].
Body, shape of, 1, [91].
Bolles, Frank, his pet owl, 1, [101], [116];
his story of a heron, [103], [104].
Bones, 1, [92], [94].
Books about birds, 1, [142]-[144].
Brooding, 1, [13]-[16].
Bubonidæ, 2, [178], [204].
Bunting, Towhee, or Chewink, 1, [76], [77]; 2, [84];
portrait, 1, [76].
Bush-Tits, 2, [198].
Butcher-birds, 2, [59].
Buzzard, Turkey, 1, [50], [51]; 2, [194].
Canary, 1, [20], [57], [81].
Caprimulgidæ, 2, [155], [203].
Cardinal, 1, [69], [132]; 2, [88];
portrait, 2, [90].
Catbird, food of, 1, [49], [126];
jerking the tail, [113]; 2, [37], [125];
portrait, 2, [36].
Cathartidæ, 2, [194], [204].
Cave-dwelling Family, 2, [30], [199].
Cedar-bird, feeding young, 1, [19];
story of affection for young, [78];
usefulness to man, [126], [129]; 2, [63];
portrait, 1, [126].
Certhiidæ, 2, [27], [198].
Chat, Long-tailed, 2, [53].
Chat, Yellow-breasted, 2, [52];
portrait, 2, [52].
Chewink, 1, [76], [77]; 2, [84];
portrait, 1, [76].
Chickadee, defending eggs, 1, [11], [12];
getting food for young, [18];
as an eater of insects' eggs, [68], [126];
affection for young, [78]; 2, [22];
portrait, 2, [22].
Chickadee, Mountain, 2, [22].
Chickadees, 2, [22].
Chuck-will's-widow, 2, [157].
Cinclidæ, 2, [42], [199].
Color in feathers, 1, [120].
See also [Plumage].
Cormorant, 1, [94].
Corvidæ, 2, [117], [202].
Cowbird, 2, [51], [98].
Creeper, Brown, 2, [27];
portrait, 2, [28].
Creeper Family, 2, [27], [198].
Creepers, 2, [19].
Crop, 1, [93].
Crossbill, American or Red, 2, [91].
Crossbill, White-winged, 2, [92].
Crossbills, 1, [97]; 2, [91].
Crow, American, punishing a young one, 1, [37];
sleeping in flocks, [59], [60];
story of an affectionate, [80];
usefulness to men, [126]; 2, [40], [117].
Crow Family, 2, [117], [202].
Cuckoo, Black-billed, 2, [174].
Cuckoo, California, 2, [174].
Cuckoo, Yellow-billed, 2, [174];
portrait, 2, [174].
Cuckoo Family, 2, [174], [203].
Cuculidæ, 2, [174], [203].
Dipper, American, 2, [42];
portrait, 2, [42].
Dipper Family, 2, [42], [199].
Down, the first plumage, 1, [15], [21], [22], [115].
Ducks, 1, [97], [115].
Eagle, Bald, 2, [189], [192].
Ears, 1, [102]-[104].
Eggs, beauty of, 1, [11];
the mother's care, [11], [12];
incubation and hatching of, [13]-[15].
Eyes, 1, [100]-[102].
Falconidæ, 2, [188], [204].
Feathers, first appearance on the young bird, 1, [22];
of the wing, [109]-[111];
of the tail, [112], [113];
the various kinds of, [114], [115];
expression of emotions by, [116];
the birds' care of, [116], [117].
See also [Plumage].
Feet, 1, [92], [105]-[108].
Finches, 2, [82], [201].
Fish, birds and dead, 1, [86], [87].
Flicker, method of feeding young, 1, [18];
food of, [85], [127];
color markings, [121]; 2, [161];
portrait, 1, [86].
Flicker, Red-shafted, 2, [161], [162].
Flycatcher, Least, 2, [136].
Flycatcher, Shining Crested, 2, [67].
Flycatching Family, 2, [135], [202].
Flying, 1, [93].
Food, 1, [48];-[55];
in winter, [67]-[69], [134];
in its relation to the welfare of man, [125]-[130].
Frigate-bird, 1, [110].
Fringillidæ, 2, [80], [201].
Geese, 1, [98], [99].
Gizzard, 1, [93].
Gnatcatcher, Blue-gray, 2, [16].
Gnatcatchers, 2, [198].
Goatsucker Family, 2, [155], [203].
Goldfinch, American, 1, [14];
story of canary and, [20];
change of color, [26];
food, [54];
flocking, [71]; 2, [82];
portrait, 1, [26].
Goldfinch, European, 1, [79].
Goldfinch, Willow, 2, [84].
Grackle, Bronzed, 2, [112].
Grackle, Purple, 2, [112].
Grackles, 2, [110].
Grosbeak, Black-headed, 2, [88].
Grosbeak, Cardinal, 1, [69], [132]; 2, [88];
portrait, 2, [90].
Grosbeak, Rose-breasted, 2, [86];
portrait, 2, [86].
Grosbeaks, 2, [86].
Grouse, 1, [58], [59], [110].
Grouse, Ruffed, 1, [111].
Gullet, 1, [93].
Gulls, 1, [101].
Hawk, American Sparrow, 2, [189];
portrait, 2, [188].
Hawk, Fish, 2, [190];
portrait, 2, [192].
Hawk and Eagle Family, 2, [188], [204].
Hawks, food of, 1, [52], [53], [126], [127];
asleep, [59];
beaks of, [97];
eyesight of, [101];
feet of, [106].
Heligoland, 1, [101].
Heron, Great Blue, 2, [114].
Herons, food of, 1, [53], [127];
bills of, [97];
story of the hearing of a heron, [103], [104];
usefulness to man, [127].
Hirundinidæ, 2, [69], [201].
Humming Family, 2, [143], [202].
Hummingbird, Anna's, 2, [149].
Hummingbird, Ruby-throated, absence of male from nest, 1, [16];
method of feeding young, [18]; 2, [144];
portrait, 1, [18].
Hummingbirds, 1, [15], [98].
Icteridæ, 2, [94], [201].
Identification, 1, [137]-[141].
Indigo-bird, 1, [47];
portrait, 1, [46].
Instinct, 1, [83].
Intelligence, 1, [83]-[87].
Japan, 1, [131].
Jay, Blue, learning to fly, 1, [31], [32];
storing food, [54];
story of a mischievous, [55], [56];
usefulness to man, [126]; 2, [113], [121];
portrait, 2, [122].
Jay, Steller's, 2, [126].
Jays, 2, [117], [202].
Kindness of birds to one another, 1, [74]-[77].
Kingbird, 1, [14], [129]; 2, [113], [136];
portrait, 2, [136].
Kingbird, Arkansas, 2, [140].
Kingfisher, Belted, 2, [170];
portrait, 2, [170].
Kingfisher Family, 2, [170], [203].
Kingfishers, 1, [21], [115].
Kinglet, Ruby-crowned, 2, [14];
portrait, 2, [14].
Kinglet and Gnatcatcher Family, 2, [14], [197].
Language, 1, [43]-[47].
Laniidæ, 2, [59], [200].
Lark, Desert Horned, portrait, 2, [132].
Lark, Horned, 2, [131].
Lark, Old-Field. See [Meadowlark].
Lark, Prairie Horned, 2, [131].
Lark, Shore, 2, [131].
Lark Family, 2, [131], [202].
Legs, 1, [92], [105], [107], [108].
Magpie, American, 2, [126];
portrait, 2, [126].
Magpie, Yellow-billed, 2, [126].
Magpies, 2, [117].
Martin, Purple, 2, [72].
Meadowlark, 1, [45], [119], [121]; 2, [97], [100];
portrait, 2, [100].
Meadowlark, Western, 2, [102].
Meadow Starlings, 2, [100].
Micropodidæ, 2, [150], [202].
Migration, 1, [61]-[68].
Mniotiltidæ, 2, [49], [200].
Mocking Thrushes, 2, [34], [199].
Mockingbird, 1, [45]; 2, [9], [34], [195].
Motacillidæ, 2, [46], [199].
Moulting, 1, [25], [26], [118].
Neck, 1, [92].
Nests, situations of, 1, [9];
materials of, [9], [10];
building of, [10];
seldom used more than once, [10], [11].
Nighthawk, 1, [107]; 2, [158];
portrait, 2, [158].
Norway, 1, [131].
Nuthatch, European, 2, [21].
Nuthatch, Red-breasted, 2, [20].
Nuthatch, Slender-billed, 2, [18].
Nuthatch, White-breasted, 2, [18];
portrait, 1, [96].
Nuthatch and Chickadee Family, 2, [18], [198].
Nuthatches, 1, [18], [96], [98].
Observation, 1, [137];-[141], [145].
Oil, 1, [117].
Oriole, Arizona Hooded, 2, [108].
Oriole, Baltimore, nest of, 1, [9], [95]; 2, [104];
portrait, 1, [10].
Oriole, Orchard, 2, [107].
Orioles, getting food for young, 1, [18];
teaching young to fly, [33], [34];
food of, [50];
affection for young, [78];
usefulness to man, [129]; 2, [104].
Osprey, American, 2, [190];
portrait, 2, [192].
Ostrich, 1,

[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, Cliff or Eave, 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. See [Thrasher, 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, or Chewink, 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, or Turkey 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. See [Cedar-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. See [Flicker].
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].


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Transcriber's Notes:

Obvious punctuation errors repaired.

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