This French video shows part of the documentary film L’île au faucon, by Allain Bougrain- Dubourg. It is about birds wintering in Senegal; especially lesser kestrels breeding in Spain and elsewhere in southern Europe.
Dutch biologists do research on Montagu’s harriers from Europe, wintering in Senegal. A male harrier wintered in 2013 near Kelcom in Senegal, and again this year. In the summer of 2013, he had nested in Spain.
In Senegal, they feed mainly on locusts.