1 Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal. rktespejos@gmail.com.
2 Institute for Game and Wildlife Research (IREC), UCLM-CSIC-JCCM, 13005 Ciudad Real, Spain.
3 Research Unit of Biodiversity (UO/CSIC/PA), Oviedo University, 33600 Mieres, Spain.
4 Terrestrial Ecology Group (TEG), Departamento de Ecología, Universidad Autónoma de Madrid, 28049 Madrid, Spain.