1. Centre d'Ecologie Fonctionnelle et Evolutive; UMR 5175; CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE; Montpellier France
2. Department of Life Sciences and Biotechnology; University of Ferrara; Via Borsari 46 I-44121 Ferrara Italy
3. Department of Physical Sciences, Earth and Environment; University of Siena; Strada Laterina, 8 53100 Siena Italy
4. FitzPatrick Institute; DST-NRF Centre of Excellence at the University of Cape Town; Rondebosch 7701 South Africa
5. Maremma Natural History Museum; Strada Corsini 5 Grosseto 58100 Italy
6. Federparchi; Via Nazionale 230 00184 Rome Italy
7. Réserve Naturelle Scandola; Parc Naturel Régional de Corse; 20245 Galeria France
8. IME (Institut Menorquí d'Estudis); Camí des Castell 28 E-07702 Maó Spain
9. Grup Balear d'Ornitologia i Defensa de la Naturalesa (GOB); Manuel Sanchis Guarner 10 07004 Palma de Mallorca Spain
10. Department of Cognitive Biology; University of Vienna, & Konrad Lorenz Institute for Ethology; University of Veterinary Medicine; Vienna Austria