INDEX 
General 
PAGE 
Acanthis hornemanni 387 
h. exilipes 388 
h. hornemanni 388 
Acanthis linaria . . 388 
l. holhoelli 388 
l. linaria 388 
l. rostrala 388 
Acdpiter cooperi 122 
velox 121 
Accipitriinae 119 
Acknowledgments 4 
Actitis macularia 192 
Aechmorphorus ocddenlalis 43 
Aeronautes saxatalis 272 
Aethiopsar cristatellus 342 
Agelaius phoeniceus 372 
Aimophila aestivalis 397 
a. bachmani 398 
A ix sponsa 93 
Alauda arvensis . . 296 
Alaudidae 296 
Albatross, Black-footed 46 
Short-tailed 46 
Yellow- nosed 46 
Albatrosses, gen. description 45 
A lea tor da 242 
Alcae 240 
Alcedinidae 276 
Alcinae 241 
Alle alle 244 
Altitude, effect of on race distribution 8 
Ammodramus bairdi 394 
savannarum. 394 
Ammospiza caudacuta 396 
c. nelsoni 396 
c. subdrgata 396 
Amphispiza nevadensis 398 
7i. nevadensis 398 
Anas platyrhyncos 87 
rubripes 88 
r. rubripes 89 
r. tristis 89 
Anatidae 73 
Anatinae 86 
Anser albifrons 83 
Anseriformes, gen. description 68 
Anserinae 77 
Anthus spinoletta. 335 
spraguei 336 
Antrostomus carolinensis 266 
nuttaUi 267 
n. nuttalli 267 
vodferus 266 
v. vodferus 267 
Aphriza virgata 184 
PAGE 
Aphrizinac 184 
Aquila chrysaetos 134 
Archilochus alexandri 274 
colubris 273 
Arctic zone, birds of 10 
Extent, boundaries 8 
Ardonetta fischeri 106 
Ardeae 60 
Ardea, herodias 61 
Ardeidae 60 
Arenaria inter pres. 185 
i. inter pres 185 
i. morinella 185 
melanocephala 186 
Arenariinae 185 
Arquatella maritima 198 
ptilocnemis 199 
p. couesi 199 
p. ptilocnemis 199 
Asio flammeus 264 
wilsonianus 263 
Astur atricapillus 120 
a. atricapillus 121 
a. striatulus 121 
Asyndesmus leidsi 281 
Attracting of birds, means of 14 
Auk, Great 240 
Razor- billed 242 
Auklet, Cassin’s 246 
Paroquet 247 
Rhinoceros 247 
Auks, gen. description 241 
Austral zone, birds of 9 
Definition and boundaries 7 
Avocet, American 211 
Avocets, gen. description 210 
Baeolophus bicolor 314 
Baldpate 90 
Banding of birds, means and value. . . 15 
Bartramia longicauda. 192 
Bibliography of bird study. 18-23 
Birds of prey, economic status 112 
See also Eagles, Hawks, Owls, Vul- 
tures 
Bittern, American 65 
Cory’s Least 66 
Least 66 
Bitterns, gen. description 60, 65 
Blackbird, Brewer’s 375 
Cow 376 
Crow 376 
76916 — 271 
415 
