Studies on Bird Migration Based on Field Studies in Southern Sweden

Accipiter nisus Africa E approximately Apus Asia E autumn migration Baltic behaviour bird migration bird species birds of prey buzzards Buteo buteo Carduelis coast Columba common buzzard common buzzard Buteo concentration Corvus course crows direction of migration east East Prussia Emberiza factors Falco Falsterbo peninsula favourable figures flocks GEYR VON SCHWEPPENBURG gliding golden eagles guiding lines h₁ Hirundinidae HOLSTEIN honey-buzzard jack-daws Jaegerspris large number less Ljungen magpies main direction mainland meteorological migrating birds migration flight migration periods migration route Milvus milvus movements Nabben number of birds number of migrating number of species number of specimens observations occur October Öland Ottenby palaearctic partim Parus passerine Pernis apivorus populations predatory birds rare reaction recruiting area resident birds Scania Sealand seen September small number small passerine birds soaring birds southern Sweden sparrow-hawks Sweden Swedish thermic currents thermic winds tion Total number weather conditions winter quarters