1. MEDRAPTORS (Mediterranean Raptor Migration Network), Via Mario Fioretti 18, 00152 Rome, Italy
2. Institute of Biodiversity Animal Health and Comparative Medicine, University of Glasgow, G12 8QQ, Glasgow, UK
3. Natural History Museum of Crete, University of Crete, P.O. Box 2208, Heraklion 71409, Crete, Greece