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Further reading

Berthold, P. (1999) 'A comprehensive theory for the evolution, control and adaptability of avian migration', Ostrich: Journal of African Ornithology, vol. 70, no. 1, pp. 1-11.
Castelvecchi, D. (2012) 'The compass within', Scientific American, vol. 306, pp. 48-53.
Lohmann, K.J. (2010) 'Magnetic field perception', Nature, vol. 464, pp. 1140-42.
Mouritsen, H. (2012) 'Search for the compass needles', Nature, vol. 484, pp. 320-1.
Mueller, J.C., Pulido, F. and Kempenaers, B. (2011) 'Identification of a gene associated with avian migratory behaviour', Proceedings of the Royal Society of London B, vol. 278, pp. 2848-56 [Online]. Available at http://rspb.royalsocietypublishing.org/ content/ early/ 2011/ 02/ 11/ rspb.2010.2567.full [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] (Accessed 24 July 2014).
Pulido, F. (2007) 'The genetics and evolution of avian migration', Bioscience, vol. 57, no. 2, pp. 165-74.
Pulido, F. and Berthold, P. (2010) 'Current selection for lower migratory activity will drive the evolution of residency in a migratory bird population', Proceedings of the National Academy of Sciences USA, vol. 107, no. 16, pp. 7341-46.

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