1. Department of Biology, University of Patras, Panepistimioupoli Rio, Patras, GR 26500, Greece
2. Department of Environment, University of the Aegean, Xenia Building, University Hill, Lesvos, Mytilene, GR 81100, Greece
3. Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, Athens, GR 15236, Greece
4. Antikythira Bird Observatory, Hellenic Ornithological Society/BirdLife Greece, 52 Ag. Konstantinou Str., Athens, GR 10437, Greece