566 
clangula americana, Clangula, 56 
Clarke’s Nutcracker, 295 
Clay-coloured Sparrow, 371 
Cliff-Swallow, 415 
clypeata, Spatula, 46 
Coccyges, 216 
Coccyzus, 218 
Colaptes, 238 
Colinus, 138 
collaris, Colaptes cafer, 239 
collaris, Marila, 55 
Columba, 157 
Columbe, 156 
columbarius, Falco, 188 
Columbian Sharp-tailed Grouse, 151 
columbiana, Nucifraga, 295 
columbianus, Olor, 72 
columbianus, Pedioccetes 
phasianellus, 151 
Colymbide, 3 
Colymbus, 5 
Common Tern, 24 
Compsothlypis, 447 
confinis, Pocecetes gramineus, 355 
connectens, Junco, 380 
Connecticut Warbler, 462 
conspersus, Catherpes mexicanus, 
487 
Conuropsis, 215 
cooperi, Accipiter, 170 
cooperi, Piranga rubra, 411 
Cooper’s Hawk, 170 
Coot, American, 98 
Cormorant Double-crested, 27 
Cormorant, Mexican, 28 
cornuta, Eremophila, 279 
coronata, Dendroica, 451 
coronata, Zonotrichia, 367 
Corvide, 282 
Corvus, 291 
Cow-bird, 302 
Crane, Little Brown, 91 
Crane, Sandhill, 92 
Crane, Whooping, 91 
Creciscus, 96 
Creeper, Rocky-Mountain, 497 
cristata, Cyanocitta, 285 
Crossbill, American, 333 
Crossbill, Mexican, 334 
Crossbill, White-winged, 334 
Crow Western, 294 
Cryptoglaux, 202 
cryptoleucus, Corvus, 293 
Cuckoo, Black-billed, 220 
Cuckoo, California, 220 
Cuckoo, Yellow-billed, 218 
Cuculide, 216 
Birds of Colorado 
cucullatus, Lophodytes, 34 
Curlew, Hudsonian, 129 
Curlew, Long-billed, 128 
currucoides, Sialia, 529 
cyanea, Passerina, 403 
Cyanocephalus, 297 
cyanocephalus, Cyanocephalus, 297 
eyanocephalus, Euphagus, 316 
Cyanocitta, 284 
cyanoptera, Querquedula, 44 
Cygnine, 71 
Cypselide, 248 
Cypseloides, 248 
Dafila, 47 
deglandi, Oidemia, 62 
delawarensis, Larus, 17 
delicata, Gallinago, 109 
Dendragapus, 145 
Dendroica, 449 
Desert Horned Lark, 279 
Desert-Sparrow, 382 
Desert Sparrow-Hawk, 192 
deserticola, Amphispiza bilineata, 
382 
diademata, Cyanocitta stelleri, 286 
Dichromanassa, 86 
Dickcissel, 405 
difficilis, Empidonax, 273 
dilophus, Phalacrocorax, 27 
Dipper, American, 474 
discors, Querquedula, 43 
Dive-dapper, 9 
Dolichonyx, 300 
domesticus, Passer, 348 
dominicus, Charadrius, 131 
dorsalis, Junco, 380 
dorsalis, Picoides americanus, 227 
Double-crested Cormorant, 27 
Dove, Mourning, 159 
Dove, White-winged, 161 
Dowitcher, Long-billed, 111 
dresseri, Somateria, 61 
Dryobates, 223 
Duck, Harlequin, 60 
Duck, Lesser Scaup, 54 
Duck, Mottled, 38 
Duck, Ring-necked, 55 
Duck, Ruddy, 64 
Duck, Scaup 54 
Duck-Hawk, 187 
Dumetella, 481 
Dusky Grouse, 145 
Eagle, Bald, 183 
Eagle, Golden, 181 
Eared Grebe, American, 6 
