JAV-00287

Nuijten, R. J. M., Kölzsch, A., van Gils, J. A., Hoye, B. J., Oosterbeek, K., de Vries, P. P., Klaassen, M. and Nolet, B. A. 2013. The exception to the rule: retreating ice front makes Bewick’s swans Cygnus columbianus bewickii migrate slower in spring than in autumn. – Journal of Avian Biology DOI: 10.1111/j.1600-048X.2013.00287.x

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