Numenius arquatus, 328. 
borealis, 97. 
hudsonicus, 97. 
longirostris, 97. 
pheopus, 98. 
tahitiensis, 98. 
Nutcracker, Clarke’s, 201. 
Nuthatch, Brown-headed, 305. 
Florida White-breasted, 304. 
Pygmy, 305. 
Red-breasted, 305. 
Slender-billed, 304. 
White-breasted, 304. 
White-naped, 305. 
Nuttallornis, 185. 
Nyctala, 144. 
acadica, 145. 
tengmalmi richardsoni, 144. 
Nyctanassa, 74. 
Nyctea, 149. 
nyctea, 149. 
Nycticorax, 74. 
nycticorax nzevius, 74. 
violaceus, 74. 
Nyctidromus, 170. 
albicollis merrilli, 170. 
OCEANITES, 37- 
oceanicus, 37. 
Oceanitine, 37. 
Oceanodroma, 36. 
furcata, 36. 
homochroa, 37. 
hornbyi, 327. 
leucorhoa, 36. 
macrodactyla, 37. 
melania, 37. 
Ochthodromus, 102. 
Odontoglossz, 66. 
Oidemia, 58. 
americana, 58. 
deglandi, 59. 
fusca, 58. 
perspicillata, 59. 
Oid-squaw, 55. 
Olor, 65. 
buccinator, 65. 
columbianus, 65. 
cygnus, 65. 
Oporornis, 282. 
Oreortyx, 107. 
pictus, 107. 
pictus confinis, 108. 
pictus plumiferus, 107. 
Oriole, Arizona Hooded, 208. 
Audubon’s, 207. 
INDEX. 
Oriole, Baltimore, 208. 
Bullock’s, 208. 
Hooded, 207. 
Orchard, 208. 
Scott’s, 207. 
Ornithion, Igo. 
imberbe, 190. 
imberbe ridgwayi, Igo. 
Oroscoptes, 291. 
montanus, 291. 
Ortalis, 119. 
vetula maccali, 119. 
Oscines, 238. 
Osprey, American, 141. 
Ossifraga, 29. 
gigantea, 29. 
Otocoris, 191. 
alpestris, 191. 
alpestris adusta, 193. 
alpestris arenicola, 192. 
alpestris chrysolema, 192. 
alpestris giraudi, 192. 
alpestris leucolama, 192. 
alpestris merrilli, 193. 
alpestris pallida, 193. 
alpestris praticola, 192. 
alpestris rubea, 193. 
alpestris strigata, 193. 
Oven-bird, 281. 
Owl, American Barn, 142. 
Aiken’s Screech, 147. 
American Hawk, 149. 
American Long-eared, 142. 
Arctic Horned, 148. 
Barred, 143. 
Burrowing, 150. 
California Pygmy, 151. 
California Screech, 146. 
Dusky Horned, 148. 
Dwarf Screech, 147. 
Elf, 151. 
Ferruginous Pygmy, 151. 
Flammulated Screech, 147. 
Florida Barred, 143. 
Florida Burrowing, 150. 
Florida Screech, 145. 
Great Gray, 144. 
Great Horned, 148. 
Hawk, 149. 
Hoskins’s Pygmy, 151. 
Kennicott’s Screech, 146. 
Lapp, 144. 
MacFarlane’s Screech, 147. 
Mexican Screech, 146. 
Pygmy, 150. 
Richardson’s, 144. 
Rocky Mountain Screech, 145. 
