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.