La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Dominance and calibration of magnetic, sunset and stellar compasses in cue conflict experiments with night-migrating passerines
Auteurs :	Jorgen Rabol, Auteur
Type de document :	Article
Dans :	Dansk Ornitologisk Forenings Tidsskrift (113(1) 2019)
Article en page(s) :	23-35
Résumé :	Compass calibrations around sunrise and sunset are generally supposed to be important and necessary for the process and progress of bird migration. However, the question remains whether this is an established fact or just conventional wisdom. Migrant passerines were tested on Christianso island (55.3 degrees N, 15.2 degrees E) in the Baltic Sea on the first or second sunset or night after trapping (and presumably arrival). More than 1300 birds were tested on more than 70 sunsets or nights. Apparently, in general a magnetic compass was not in action, and (therefore) indications of compass calibrations were almost non-existent.

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