Avian Migration: The Ultimate Red-Eye Flight
Birds that migrate at night enter a state of sleepless mania and gorge on foods by day, behaviors mediated by their biological clocks
The Next Leg
Migration, one of the most salient and captivating animal behaviors, continues to mystify us even as our knowledge of it grows. Migratory birds are giving us humans a run for our money. Superficially, their lives seem pretty attractive: They are immune to the maladaptive effects of body fat, they function well without sufficient sleep, they dwell in seasonally suitable locations. Although we still don’t fully understand how birds accomplish these feats, the answers are likely far from simple. At least one unifying principle can gratify our curiosity: Biological clocks are involved in virtually all aspects of migratory physiology and behavior. Perhaps people could learn a lesson from birds, and, rather than resisting our natural daily and seasonal rhythms, march to the beat of our own biological clocks.
- Bairlein, F. 2002. How to get fat: Nutritional mechanisms of seasonal fat accumulation in migratory songbirds. Naturwissenschaften 89:1–10.
- Bairlein, F., D. R. Norris, R. Nagel, M. Bulte, C. C. Voigt, J. W. Fox, D. J. T. Hussell and H. Schmaljohann. 2012. Cross-hemisphere migration of a 25 g songbird. Biology Letters 8:505–507.
- Bartell, P. A., and E. Gwinner. 2005. A separate circadian oscillator controls nocturnal migratory restlessness in the songbird Sylvia borin. Journal of Biological Rhythms 20:538–549.
- Beauchamp, G. 2011. Why migrate during the day: A comparative analysis of North American birds. Journal of Evolutionary Biology 24:1969–1974.
- Charoensuksai, P., and W. Xu. 2010. PPARs in rhythmic metabolic regulation and implications in health and disease. PPAR Research 2010:1–9.
- Emlen, S. T., and J. T. Emlen. 1966. A technique for recording migratory orientation of captive birds. Auk 83:361–367.
- Farner, D. S. 1964. The photoperiodic control of reproductive cycles in birds. American Scientist 52:137–156.
- Fuchs, T., D. Maury, F. R. Moore and V. P. Bingman. 2009. Daytime micro-naps in a nocturnal migrant: An EEG analysis. Biology Letters 5:77–80.
- Fusani, L., M. Cardinale, C. Carere and W. Goyman. 2009. Stopover decision during migration: Physiological conditions predict nocturnal restlessness in wild passerines. Biology Letters 5:302–309.
- Guglielmo, C. G. 2010. Move that fatty acid: Fuel selection and transport in migratory birds and bats. Integrative and Comparative Biology 50:336–345.
- Gwinner, E. 1996. Circadian and circannual programmes in avian migration. Journal of Experimental Biology 199:39–48.
- Gwinner, E. 2003. Circannual rhythms in birds. Current Opinion in Neurobiology 13:770–778.
- Helm, B. 2006. Zugunruhe of migratory and non-migratory birds in a circannual context. Journal of Avian Biology 37:533–540.
- McWilliams, S. R., C. Guglielmo, B. Pierce and M. Klaassen. 2004. Flying, fasting, and feeding in birds during migration: A nutritional and physiological ecology perspective. Journal of Avian Biology 35:377–393.
- Rattenborg, N. C., B. H. Mandt, W. H. Obermeyer, P. J. Winsauer, R. Huber, M. Wikelski and R. M. Benca. 2004. Migratory sleeplessness in the white-crowned sparrow (Zonotrichia leucophrys gambelii). PLoS Biology 2:924–936.
- Watson, M. L., J. V. Wells and R. W. Bavis. 2011. First detection of night flight calls by pine siskins. Wilson Journal of Ornithology 123:161–164.
- Weber, J. 2009. Commentary: The physiology of long-distance migration: Extending the limits of endurance metabolism. Journal of Experimental Biology 212:593–597.
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