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The Interaction of Stars and Magnetic Field in the Orientation System of Night Migrating Birds
Author(s) -
Wiltschko Wolfgang,
Wiltschko Roswitha
Publication year - 1975
Publication title -
zeitschrift für tierpsychologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.739
H-Index - 74
eISSN - 1439-0310
pISSN - 0044-3573
DOI - 10.1111/j.1439-0310.1975.tb00912.x
Subject(s) - stars , orientation (vector space) , magnetic field , astronomy , field (mathematics) , astrophysics , geology , physics , geometry , mathematics , quantum mechanics , pure mathematics
To investigate the relative importance of stellar and magnetic cues for the compass orientation of night migrating birds, 45 European robins ( Erithacus rubecula ) were tested in automatically registering cages with view of the clear natural night sky. One group was tested in the natural local geomagnetic field, the other group in a field pointing to 120° ESE; birds from both groups were additionally tested in a magnetic field the horizontal component of which was compensated. The observed orientation behavior leads to the conclusion that star compass and magnetic compass are not independent, but that they are interlinked in the way that the star compass is established by information from the magnetic compass.