1. School of Biological Sciences; University of East Anglia; Norwich NR4 7TJ UK
2. School of Life Sciences; University of Nottingham; Nottingham NG7 2RD UK
3. School of Environmental Sciences; University of East Anglia; Norwich NR4 7TJ UK
4. Latvian Ornithological Society; Skolas iela 3 Riga LV-1010 Latvia
5. A Rocha France; 233 route de Coste Basse 13200 Arles France
6. Institut de recherche de la Tour du Valat; Le Sambuc 13200 Arles France
7. PSL Research University; CEFE UMR 5175; CNRS; EPHE; Université de Montpellier; Université Paul-Valéry Montpellier; 1919 route de Mende 34293 Montpellier France