Fig. 2From: Harmonizing methods for wildlife abundance estimation and pathogen detection in Europe—a questionnaire survey on three selected host-pathogen combinationsNumber of study areas categorized by size of study area in km2 reported by the questionnaire respondents for wild boar and Aujeszky’s disease virus (n = 31) and for red fox and Echinococcus multilocularis (n = 18)Back to article page