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APA Citation
Trierweiler, C., Mullié, W. C., Drent, R. H., Exo, K., Komdeur, J., Bairlein, F., Harouna, A., de, M., Koks, B. J., & Sandercock, B. (n.d.). a Palaearctic migratory raptor species tracks shifting prey availability within its wintering range in the Sahel. Journal of animal ecology, 82, 107–120. http://access.bl.uk/ark:/81055/vdc_100024508889.0x00004d