112, 147, 148; of nomadic 

 species, 233 



Wapsipinicon River, 101 



Warbler, Yellow, 13, 237 



Washington, 248 



Waterfowl breeding range, 228- 

 231, 248-251, 256-258; map, 

 117 



Wavie. See Goose, Blue, and 

 Goose, Lesser Snow. 



Weather: during fall migration, 

 97-99, 104-107, 137, 207- 

 213; maps, 105, 119, 210; 

 during spring migration, 118— 

 120, 127, 131-133, 136, 164- 

 165, 171-176; during molting 

 shift, 142; movements, 147; 

 bad, 163-176; cold front, 

 171; deflection of migration 

 by, 175- 198; November pat- 

 tern, 210; influence on pio- 

 neering, 234 



Western Grebe, 143 



Whistling Swan. See Swan, 

 Whistling. 



White Horse Plains, Manitoba, 

 128 



White Pelican, 119 



White-fronted Goose, 122, 138, 

 175 



Whitemud River, Manitoba, 78, 

 129-130 



Whitewater Lake, Manitoba, 6, 

 9, 102, 140 



White-winged Scoter 23, 121, 

 122 



Whooping Crane, 225, 236 



Widgeon, 18 



Wildness, 224 



Wilson's Snipe, 62, 66 



Wind: perception of, 55-72, 

 197; during migration, 97, 

 104-107, 116-120, 131, 170- 

 172, 175, 184, 207-213; in- 

 fluence on travel dimensions, 

 151, 153; rdation to pressure 



SUBJECT INDEX 



areas, 104-107, 118-120, 



207-213, 234 

 Wing load, 69 

 Wing slot, 64 

 Winglet, 64-65 

 Wintering grounds, 206, 207, 



218-220, 225, 238-240; map, 



117 

 Wisconsin, 8, 107, 167, 233, 



246, 248, 250, 257 

 Wood Duck, 18, 248 

 Woodcock, 79 

 Woodcock, European, 118 

 Woodpecker, Downy, 237 

 Wyoming, 244, 248 



Yearling, 127, 227 

 Yellow Wagtail, 222 

 Yellow Warbler, 13, 237 

 Yellow-legs, Lesser, 144 

 Young birds. See Duckling, Ju- 

 venile, Parent-child relation. 

 Yukon Territory, 251 



301 



