1. Txepetxa Ringing Group and Association Vitoria‐Gasteiz Spain
2. Dept of Integrative Biology, Oklahoma State Univ. Stillwater OK USA
3. School of Biological, Earth and Environmental Sciences, Univ. College Cork Cork Ireland
4. Evolution and Conservation Biology Research Group, Dept of Biodiversity, Ecology and Evolution, Faculty of Biology, Univ. Complutense de Madrid Madrid Spain
5. Dept of Biology, Univ. of Florida Gainesville FL USA