Map: Eurasian reed warbler breeding range and variation in geomagnetic signature (IMAGE)

Bangor University

Map: Eurasian reed warbler breeding range and variation in geomagnetic signature

Caption

Map: Eurasian reed warbler breeding range (green) in Europe and variation in the geomagnetic signature (total magnetic intensity, magnetic inclination and magnetic declination). The natural migratory direction from the study site (white dot) towards Africa during autumn is shown as black arrow. The expected compensatory direction from the simulated site (black star) is shown as white arrow. Circular diagrams: Left: orientation of birds experiencing the natural magnetic field at the study site in Austria. Right: orientation of birds experiencing the simulated magnetic field of a site in Russia while still being at the study site in Austria. Arrows depict the respective mean group direction. Black dots show the orientation of the individual birds tested.

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