Fig. 2.

Findings of Dermacentor reticulatus superimposed on the map of the Köppen–Geiger climate classification (defined by a three-letter code) and frequency distribution of D. reticulatus occurrence. Absolute frequencies depict the number of tick locations, relative frequencies the fraction of tick locations in each climate class. Highest frequencies of D. reticulatus occurrence were observed in warm temperate climates with precipitation all year round (Cfa, Cfb) and boreal (continental) climates with precipitation all year round (Dfa, Dfb), both with warm or hot summers