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Article
M. Widmer, Auteur ; H. Biebach, AuteurDans Ardea (89(1) 2001)Long-distance migrants often arrive on their breeding grounds with large fat stores. Two explanations for this phenomenon are (1) that large fat stores at arrival are needed to speed up the breeding schedule and to counteract possible time const[...]
Article
M. Klaassen, Auteur ; H. Biebach, AuteurRadar observations on the altitude of bird migration and altitudinal profiles of meteorological conditions over the Sahara desert are presented for the autumn migratory period. Migratory birds By at an average altitude of 1016 m (a.s.l.) during [...]
Article
H. Biebach, AuteurDuring long-distance migration, passerine birds alternate between Eight and stopover phases. Flight phases can last one to three consecutive nights with rest during the days; stopover phases last one to three weeks. During long flight phases, su[...]
Article
U. Bauchinger, Auteur ; H. Biebach, AuteurPhenotypic flexibility of organs in migratory birds has been documented for a variety of species of different genera during the migratory period. However, very little is known about phenotypic mass changes of organs with respect to other events [...]
