Polarized skylight does not calibrate the compass system of a migratory bat ...

• Main Authors: Lindecke, Oliver, Voigt, Christian C., Pētersons, Gunārs, Holland, Richard A.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Zenodo 2015
• Subjects: Biodiversity; Mammalia; Chiroptera; Chordata; Animalia; bats; bat; Pipistrellus nathusii
• Online Access: https://dx.doi.org/10.5281/zenodo.13463481; https://zenodo.org/doi/10.5281/zenodo.13463481

(Uploaded by Plazi for the Bat Literature Project) In a recent study, Greif et al. (Greif et al. Nat Commun 5, 4488. ( doi:10.1038/ncomms5488 )) demonstrated a functional role of polarized light for a bat species confronted with a homing task. These non-migratory bats appeared to calibrate their magnetic compass by using polarized skylight at dusk, yet it is unknown if migratory bats also use these cues for calibration. During autumn migration, we equipped Nathusius' bats, Pipistrellus nathusii , with radio transmitters and tested if experimental animals exposed during dusk to a 90° rotated band of polarized light would head in a different direction compared with control animals. After release, bats of both groups continued their journey in the same direction. This observation argues against the use of a polarization-calibrated magnetic compass by this migratory bat and questions that the ability of using polarized light for navigation is a consistent feature in bats. This finding matches with observations ...