1. Centre for Environmental and Marine Studies (CESAM), Department of Biology, University of Aveiro, Aveiro, Portugal
2. Centre for Ecology, Evolution and Environmental changes (cE3c), Department of Animal Biology, Faculty of Sciences, University of Lisbon, Portugal
3. Instituto da Biodiversidade e das Áreas Protegidas Dr. Alfredo Simão da Silva (IBAP), Bissau, Guinea-Bissau
4. BirdEyes, Centre for Global Ecological Change at the Faculties of Science & Engineering and Campus Fryslân, Leeuwarden, The Netherlands