576 
Warbler, Yellow, 449 
Water-Ouzel, 475 
Waiter-Thrush, Grinnell’s, 462 
Water-witch, 9 
Waxwing, Bohemian, 425 
Waxwing, Cedar, 426 
Western Blue Grosbeak, 401 
Western Chipping Sparrow, 369 
Western Crow, 294 
Western Evening Grosbeak, 325 
Western Field-Sparrow, 373 
Western Flycatcher, 273 
Western Gnatcatcher, 513 
Western Golden-crowned Kinglet, 
510 
Western Goldfinch, 344 
Western Goshawk, 173 
Western Grasshopper Sparrow, 359 
Western Grebe, 4 
Western Gull, 16 
Western Horned Owl, 208 
Western House-Wren, 491 
Western Lark-Sparrow, 361 
Western Marsh-Wren, 495 
Western Meadow-Lark, 309 
Western Mocking-Bird, 479 
Western Night-Hawk, 246 
Western Raven, 291 
Western Red-tail, 174 
Western Robin, 523 
Western Sandpiper, 118 
‘Western Savannah Sparrow, 357 
Western Solitary Sandpiper, 122 
Western Summer Tanager, 411 
Western Tanager, 409 
Western Tree-Sparrow, 368 
Western Vesper-Sparrow, 355 
Western Warbling Vireo, 433 
Western Willet, 124 
Western Wood-Pewee, 271 
Western Yellow-throat, 465 
Wheatear, 526 
Whip-poor-will, 243 
White Ibis, 75 
White Pelican, American, 28 
White-crowned Sparrow, 364 
White-faced Glossy Ibis, 77 
White-headed Jay, 289 
White-necked Raven, 293 
White-rumped Sandpiper, 114 
White-rumped Shrike, 429 
White-tailed Ptarmigan, 148 
White-throated Sparrow, 367 
White-throated Swift, 250 
White-winged Crossbill, 334 
White-winged Dove, 161 
White-winged Junco, 374 
Birds of Colorado 
White-winged Scoter, 62 
Whistling Swan, 72 
Whooping Crane, 91 
Willet, Western, 124 
williamsoni, Sphyrapicus, 231 
Williamson’s Sapsucker, 231 
Willow-Thrush, 518 
wilsoni, Gallinago, 109 
Wilsonia, 468 
wilsonianus, Asio, 197 
Wilson’s Phalarope, 103 
Wilson’s Snipe, 109 
Wilson’s Warbler, 469 
Winter Wren, 493 
Wood-Duck, 48 
Wood-Ibis, 78 
Wood-Pewee, 270 
Wood-Pewee, Western, 271 
Wood-Thrush, 517 
Woodcock, American, 108 
Woodhouse Jay, 287 
woodhousei, Aphelocoma, 287 
Woodpecker, Alpine Three-toed, 227 
Woodpecker, Batchelder’s, 226 
Woodpecker, Hairy, 225 
Woodpecker, Lewis’, 235 
Woodpecker, Northern Pileated, 233 
Woodpecker, Red-bellied, 237 
Woodpecker, Red-headed, 233 
Woodpecker, Rocky Mountain 
Hairy, 224 
Woodpecker, Texan, 227 
Wren, Baird’s, 490 
Wren, Cajfion, 487 
Wren, Rock, 485 
Wren, Short-billed Marsh-, 494 
Wren, Western House-, 491 
Wren, Western Marsh-, 495 
Wren, Winter, 493 
wrighti, Empidonax, 277 
Wrights Flycatcher, 277 
Xanthocephalus, 304 
xanthocephalus, Xanthocephalus 
304 
Xema, 21 
Yellow Warbler, 449 
Yellow-billed Cuckoo, 218 
Yellow-billed Loon, 11 
Yellow-crowned Night-Heron, 89 
Yellow-headed Blackbird, 304 
Yellow-legs, 121 
Yellow-legs, Greater, 120 
Yellow-throat, Western, 465 
Zamelodia, 398 
Zenaidura, 158 
Zonotrichia, 363 
