1. Department of Ornithology, Aranzadi—Society of Sciences, Zorrogagaina 11, 20014 Donostia-San Sebastián, Spain
2. CIBIO-InBIO/UE, Research Center in Biodiversity and Genetic Resources, University of Évora, Casa Cordovil 2a Andar, Rua Dr. Joaquim Hemrique da Fonseca, 7002-554 Évora, Portugal