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Article
B. A. Nolet, Auteur ; R. H. Drent, AuteurCurrent models of bird migration consider the optimal decision making of individuals irrespective of the behaviour of conspecifics. We observed the foraging behaviour of Bewick's Swans Cygnus columbianus during their stop-over in the Dvina Bay i[...]
Article
M. Klaassen, Auteur ; J. H. Beekman, Auteur ; J. Kontiokorpi, Auteur ; R. J. W. Mulder, Auteur ; B. A. Nolet, AuteurBecause energy reserves limit flight range, wind assistance may be of crucial importance for migratory birds. We tracked eight Bewick's swans Cygnus columbianus bewickii, using 95-g satellite transmitters with altimeters and activity sensors, du[...]
Article
J. H. Beekman, Auteur ; B. A. Nolet, Auteur ; M. Klaassen, AuteurDans Ardea (90(3) 2002)Some migratory birds refuel at stopover sites that they by-pass on the return trip. In theory, this skipping behaviour is only expected in time-selected migrants when the overflown site is of a lower quality than the departure site. We provide e[...]
