The wintering destination of European Honey Buzzards is determined by the wind on their first migration, not by genetics

see www.sciencedaily.com/releases/2017/05/170524084602.htm

• W. M. G. Vansteelant, J. Kekkonen, P. Byholm. Wind conditions and geography shape the first outbound migration of juvenile honey buzzards and their distribution across sub-Saharan Africa. Proceedings of the Royal Society B: Biological Sciences, 2017; 284 (1855): 20170387 DOI: 10.1098/rspb.2017.0387