1. Department of Zoology and Animal Cell Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Alava, Spain.
2. Department of Biodiversity, Ecology and Evolution, Faculty of Biology, Universidad Complutense de Madrid (UCM), Madrid, Spain.
3. Instituto de Investigación en Recursos Cinegéticos (IREC) (CSIC-UCLM-JCCM), Ronda de Toledo 12, 13005 Ciudad Real, Spain.
4. Department of Ornithology, Aranzadi Sciences Society, Zorroagagaina 11, 20014 Donostia, Spain.