Great Lakes route, 60 

 Grebe, 34 

 Grosbeak, 45, 74 



black-headed, 37 



evening, 74 



pine, 72 



rose-breasted, 33, 45, 46 (map) 

 Gross, Alfred O., 74 

 Groups, movements of, 12 

 Grouse, ruffed, 82 

 Gull, 16, 68, 73, 78 



herring, 73 



Ross's, 68 

 Hawk, 2, 16, 19, 26, 34, 42 



broad-winged, 16 



Cooper's, 16 



duck, 19, 20 



red-tailed, 16 



rough-legged, 16 



sharp-shinned, 16 



Swainson's, 16 

 Herodotus, 2 

 Heron, 19, 20, 73 



black-crowned night, 73 



little blue, 73 



snowy, 73 

 Hesiod, 2 

 Hesperornis, 11 

 Hibernation, 4 

 Homer, 2 



Homing instinct, 30 

 Hummingbird, ruby-throated, 79 

 Ichthyornis, 11 

 Influence of weather, 80 

 Insects, 29 

 Jacksnipe, 37 

 Jaeger, Edmund C, 5 

 Jaeger, parasitic, 68 

 Jay, blue, 34, 83 

 Junco, 10, 34, 72 



slate-colored, 37, 70, 75 

 Kingbird, 32, 42, 55 

 Kingfisher, belted, 34 

 Kinglet, 77 



golden-crowned, 75 

 Kite, 4 



Kittiwake, red-legged, 68 

 Knot, 11, 42 

 Lapwing, 28 

 Lark, horned, 19 



meadow, 34, 76 

 Lewis, Harrison F., 57 

 Lincoln, Frederick C, 5 

 Long distance migrations, 38 



Longspur, 34, 76 



Lapland, 37, 75 

 Loon, 16 



yellow-billed, 84, 85 

 Mackenzie Valley route, 60 

 Magnetic sense, 30 

 Magnus, Olaus, 4 

 Mallard, 22, 31, 33, 58 

 Man-o'-war bird, 30 

 Martin, purple, 12 

 Migration, advantages of, 6 



altitudes, 26 



distances, 38 



diurnal, 15 



fall, 37 



historical accounts, 4 



long distance, 38 



mystery of, 4 



nocturnal, 15 



origin, 7 



perils, 75 



problems, 81 



routes, 41 



segregation during, 31 



short, 34 



species and groups, 12 



speed, 18 



tneories of causes, 7 



undetermined, 34 



vagrant, 73 



variable, 35 



vertical, 72 



weather, 80 

 Mississippi Valley route, 60 

 Mockingbird, 83 

 Movements of residents, 82 

 Movements of species and groups, 12 

 Murre, 29 



Mystery of migration, 4 

 Nighthawk, 9, 16, 32, 38, 55, 60, 70 

 Nocturnal migration, 15 

 Northern ancestral home theory, 8 

 Nutcracker, Clark's, 73 

 Nuthatch, 7 



white-breasted, 83 

 Orientation, 28 

 Origin of migration, 7 

 Oriole, 15 



orchard, 9 

 Ovenbird, 70, 78, 80 

 Owl, great horned, 34 



screech, 83 



snowy, 12, 74 

 Pacific coast route, 63 



100 



