Subject Index 



Abmigration, 92 



Accidents, 165-168 



Acuity, visual, 34-36, 150 



Adirondack Mountains, 230 



Aerodynamics of flight, 55-72 



Age: as determinant in migra- 

 tion, 92-94, 107-110, 144- 

 147, 205-213; of independ- 

 ence, 93, 145, 228; of breed- 

 ing, 127 



Air speed, 57-59, 67 



Airplane, compared with bird, 

 33, 57, 63-64, 151, 155-157 



Alarm, 24 



Albatross, Black-footed, 180 



Alberta, 102, 103, 242, 244, 257 



Alighting, 55, 61, 66-72 



Alpine Swift, 198 



Altitude of flight: relative to 

 other travel dimensions, 11, 

 60, 82-83, 150-156, 172, 177; 

 of blindfolded birds, 71; in 

 fall migration, 97-98, 137; in 

 spring migration, 114, 128; 

 over water, 177, 179, 183-184 



American Bittern, 138 



American Crow. See Crow, 

 American. 



American Egret, 248 



American Eider, 240 



American Golden-eye, 122, 127, 

 248 



American Merganser, 122 



Anticyclone. See Atmospheric 

 pressure. 



Appetitive behavior, 124-126, 



201-205 

 Arctic breeding grounds, 251 



Arctic Tern, 208 



Arkansas, 79 



Arkansas Kingbird, 228, 232- 



233 

 Arrival of spring migrants, 3—4, 



81, 116, 121, 122, 128 

 Artificial transplanting, 222, 

 234-236 



Assessippi, Manitoba, 227 



Assiniboine River, 102 



Atlantic Ocean, 180-181, 185, 

 208 



Atmospheric pressure: fall, 104- 

 107, 137, 207-213; spring, 

 118-120, 136, 171, 175-176; 

 and migration, 207; Aleutian 

 low-pressure area, 208, 210, 

 213; Greenland low-pressure 

 area, 208, 210, 213, 234. See 

 also Weather. 



Auditory cue, 24 



Auslbser, 42 



Autumn migration. See Fall mi- 

 gration. 



Awakening time, 77, 79 



Awareness: of time, 73-82, 86, 

 159-161; of space, 82-86; of 

 direction, 121-123, 192-213, 

 206-207; of velocity, 151- 

 155, 172, 183-184. See also 

 Perception. 



Bag tally, 107-110 



Balance, 61-64 



Bald Eagle, 209 



Baldpate (American Widgeon), 



52, 107-109, 122, 139, 140, 



169, 224, 248 

 Baltimore Oriole, 138 

 Barn Swallow, 62, 66, 136, 241 

 Barrow's Golden-eye, 127, 248 

 Bathing, 78 

 Bear River Marsh, 139 

 Bees, 77, 197 

 Bering Sea, 163 

 Big Point, Manitoba, 130 

 Birthright traditions, 238, 241- 



242 

 Bittern, American, 138 

 Black Duck, 75, 112, 239, 248 

 Black-bellied Plover, 12 

 Blackbird, Brewer's, 128-133, 



190 

 Blackbird, Red-winged, 62, 66, 



71, 77, 119, 128-133, 136, 

 171, 190 



Blackbird, Rusty, 119, 128-133, 

 190 



Blackbird, Yellow - headed, 13, 

 62-70, 119, 128-133, 171, 

 190 



Black-crowned Night Heron, 12, 

 21, 138 



Blindfold, flight with, 61-72 



Blue Goose. See Goose, Blue. 



Blue Heron, Great, 119 



Blue Jay, 127 



Bluebill. See Scaup, Lesser. 



Blue- winged Teal. See Teal, 

 Blue-winged. 



Bobolink, 232 



Brant, 239 



Breeding behavior: pair forma- 

 tion, 16, 92, 236, 239; and 

 valence, 40-42; territory, 40- 

 41, 85, 126, 140; species com- 

 pared, 92-94; and migration, 

 107-108, 122-127; remating, 

 126; renesting, 126, 256; age 

 of breeding, 127; traditions, 

 222-223, 226-230, 233-236, 

 238, 239-258; and pioneer- 

 ing, 228; and subspecies, 239- 

 241 



Breeding range, 228-231, 243- 

 252, 256-258; map, 117 



British Columbia, 244 



Broad-front movements, 102- 

 103, 105, 124, 128, 137 



Bronzed Grackle, 62, 77, 128- 

 133 



Brood. See Duckling. 



Buckeye Lake, Ohio, 12, 99, 

 100, 165 



Bufflehead, 122, 248 



Bunting, Snow, 174 



Calculated course, 58 

 California, 180, 198, 222, 225, 

 227, 242, 248, 257 



295 



