@article{PB-5819FD7D3CE2EDAA473D,
  title = {Polarized Light Cues Underlie Compass Calibration in Migratory Songbirds},
  author = {Rachel Muheim and John B. Phillips and Susanne Åkesson},
  journal = {Science},
  year = {2006},
  doi = {10.1126/science.1129709}
}