1. Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), CSIC Sevilla Spain
2. Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam Amsterdam Netherlands
3. BirdEyes Centre for Global Ecological Change, University of Groningen Leeuwarden Netherlands
4. Independet researcher Sevilla Spain
5. Terra Naturalis Madrid Spain
6. Grupo de Rehabilitación de la Fauna Autóctona y su Hábitat (GREFA) Madrid Spain