Christiane Trierweiler, Wim C. Mullié, Rudi H. Drent, Klaus-Michael Exo, Jan Komdeur, Franz Bairlein, Abdoulaye Harouna, Marinus de Bakker and Ben J. Koks A Palaearctic migratory raptor species tracks shifting prey availability within its wintering range in the Sahel Journal of Animal Ecology 82
Article first published online: 8 NOV 2012 | DOI: 10.1111/j.1365-2656.2012.02036.x
Contrary to earlier hypotheses of random movements in the Sahel, this study shows that the migratory raptor Montagu's harrier visits distinct home ranges, is site-faithful and tracks seasonal changes in (grasshopper) food availability. Such itinerancy may be the rule rather than an exception in insectivorous birds wintering in African savannahs.
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