Polarized light cues underlie compass calibration in migratory songbirds
Författare
Summary, in English
Migratory songbirds use the geomagnetic field, stars, the Sun, and polarized light patterns to determine their migratory direction. To prevent navigational errors, it is necessary to calibrate all of these compass systems to a common reference. We show that migratory Savannah sparrows use polarized light cues from the region of sky near the horizon to recalibrate the magnetic compass at both sunrise and sunset. We suggest that skylight polarization patterns are used to derive an absolute (i.e., geographic) directional system that provides the primary calibration reference for all of the compasses of migratory songbirds.
Publiceringsår
2006
Språk
Engelska
Sidor
837-839
Publikation/Tidskrift/Serie
Science
Volym
313
Issue
5788
Dokumenttyp
Artikel i tidskrift
Förlag
American Association for the Advancement of Science (AAAS)
Ämne
- Biological Sciences
- Zoology
Aktiv
Published
Forskningsgrupp
- Animal Navigation Lab
ISBN/ISSN/Övrigt
- ISSN: 1095-9203