1. Dutch Butterfly Conservation; Wageningen The Netherlands
2. Resource Ecology Group; Department of Environmental Sciences; Wageningen University; Wageningen The Netherlands
3. Spatial Ecology Department; Royal Netherlands Institute for Sea Research (NIOZ-Yerseke); Yerseke The Netherlands
4. CITAB - Center for Research and Technology in Agro-Environmental and Biological Sciences; University of Trás-os-Montes and Alto Douro; Vila Real Portugal