292 



INDEX. 



Autumn Bird Waves, persistence 

 of, 258 



Autumn Bird Waves, vast size of, 

 258 



Autumn, cross migration in, 262, 

 263 



Autumn Migrants, table of, 236 



Autumn Migration, commence- 

 ment of, 250 



Autumn Migration, duration of, 

 22 ^ 



Autumn Migration, eastern wave 

 of, 253, 254 



Autumn Migration, growing in- 

 tensity of, 251 



Autumn Migration, impulse of, 



Autumn Migration, minor streams 



of, 230, 233 

 Autumn Migration of Birds, 221 

 Avaiit-coiiricres, 69 

 Avian Distribution, theories of, 



113 

 Azores, migration over, 91 



Balloon, use of, in studying 



Migration, 84 

 Bermudas, avifauna of, 131, 132 

 Bermudas, migration over, 91, 92 

 Bernicla glaucogaster^ 184 

 Bernicla riificollis^ 184 

 Birds and Storms, 87 

 Birds at Sea, 170, 171 

 Birds, difficulty of noting de- 

 parture of, 226 

 Birds, effects of temperature on 



migrating, 86, 87 

 Birds feeding at dusk, 43, 44 

 Birds, fossilized remains of, 29 

 Birds,gregariousnessof,in autumn, 



227 

 Birds, hibernation of, 5 

 Birds, island species of, 129, 130 

 Birds, local movements of, 152 

 Birds, origin of, 28 

 Birds, spring migration of, 200 

 Birds, transformation of, 4, 5 

 Botaiirus le?itigntosus, 1 80, 1 84 

 Branta canadensis^ 2 1 7 

 Breeding areas, reversal of, 143 



British Islands, avifauna of, 132,' 



133 



British Islands, correlation of 

 migration on Heligoland and, 

 254—257 



British Islands, diverse character 

 of migration in, 239 



British Islands, migration in the, 

 238 



British Islands, routes of migra- 

 tion in, 242, 243, 244, 245 



British Islands, spring migration 

 in, 246-250 



British lighthouses and light- 

 vessels, migration at, 241 



British migrants, classification of, 



245 

 British migrants, tables showing 



the duration of flight of, 266 — 



282 

 Bulweria cohimbma, 184 

 Bunting, Black-headed, migration 



of, 207 

 BiUof'ides viresccns^ 184 



Caccabis rufa, 91 



Calidris arcnaria, 45, 46, 56, 216, 



218, 223, 236 

 Caprimulgus eufopaiis, 73, 218, 



236 

 Caprimulgus rujicollis, 1 84 

 Carpodacus, 140 

 Carpodacus erythrinus, 207, 214 

 Carpodaciis roseus, 1 84 

 Ceryle alcyon, 92, 184 

 CliCEtura caudacuta, 180, 184, 230 

 Chatura pclagica^ H, I9 

 Cha:tura pclagica^ hibernation of, 



14 

 Charadriid/E, 41, 49, 50, 64, 66, 



96, 102, 190, 247 

 Charadriid^, ancient species of, 



48 

 Charadriidas, evidence in favour 



of South Polar origin of, 49, 50, 



51,52 



Charadriidae, initiation of migra- 

 tion in, 41 



Charadriidae, isolated species of, 

 in Southern Hemisphere, 51, 52 



