An Individual-based Model of the Summer Energy Budget of Red Deer (Cervus elaphus L.) in the Swiss National Park Christoph Küffer, Andreas Fischlin and Flurin Filli Christoph Küffer, Geobotanical Institute, Federal Institute of Technology (ETH Zurich), Zürichbergstrasse 38, CH-8044 Zurich, Switzerland Andreas Fischlin, Terrestrial Systems Ecology, Institute of Terrestrial Ecology, Department of Environmental Sciences, Swiss Federal Institute of Technology (ETH Zurich), Grabenstr. 3, CH-8952 Schlieren/Zurich, Switzerland (corresponding author) Flurin Filli, Swiss National Park, CH-7530 Zernez, Switzerland