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Citations
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Cochran, W. W., Mouritsen, H., & Wikelski, M. (2004). Migrating songbirds recalibrate their magnetic compass daily from twilight cues. Science, 304(5669), 405–408.
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Froy, O., Gotter, A. L., Casselman, A. L., & Reppert, S. M. (2003). Illuminating the circadian clock in monarch butterfly migration. Science, 300(5623), 1303–1305.
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Muheim, R., Phillips, J. B., & Akesson, S. (2006). Polarized light cues underlie compass calibration in migratory songbirds. Science, 313(5788), 837–839.
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Nadis, S. (2002). Biologists join drive to turn down the lights (Vol. 419).
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Smith, M. (2009). Time to turn off the lights. Nature, 457(7225), 27.
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