Acknowledgements
We thank staff of Nahuel Huapi National Park, D. Mujica and C. Chehebar, staff of Parque Municipal Llao-Llao and Dirección de Áreas Protegidas, M.S. Millerón for logistic support and permission to carry out fieldwork. We also thank A.P. Duarte, A. Fernández, A. Santone, B.R. Delgado, B. Lovazzano, E. Valfosca, I. Villa, J.G. Calzada, J. Gastaudo, K. Buteler, L.M. Valfosca, M.E. Valfosca and P. San Pedro for valuable assistance in the field. Special thanks go to Ezequiel Rodriguez-Cabal who made the drawings. This research was supported with grants from “Agencia Nacional de Promoción Científica y Tecnológica” of Argentina (PICT 2014-2484) to MARC and from “The Rufford Foundation” to AV (ID 26510-1).