The Eurasian shrew and vole tickIxodes triangulicepsBirula lives in the nests and burrows of its small mammalian hosts and is—along with larvae and nymphs ofIxodes ricinusorIxodes persulcatus—one of the most commonly collected tick species from these hosts in its Eurasian range.Ixodes triangulicepsis a proven vector ofBabesia microti. In this study, up-to-date maps depicting the geographical distribution and the climate preference ofI. triangulicepsare presented. A dataset was compiled, resulting in 1161 georeferenced locations in Eurasia. This data set covers the entire range ofI. triangulicepsfor the first time. The distribution area between 8\documentclass[12pt]{minimal}
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				\begin{document}$$^\circ$$\end{document}∘W–105\documentclass[12pt]{minimal}
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				\begin{document}$$^\circ$$\end{document}∘E and 40–69\documentclass[12pt]{minimal}
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				\begin{document}$$^\circ$$\end{document}∘N extends from Northern Spain to Western Siberia. To investigate the climate adaptation ofI. trianguliceps, the georeferenced locations were superimposed on a high-resolution map of the Köppen–Geiger climate classification. The Köppen profile forI. trianguliceps, i.e., a frequency distribution of the tick occurrence under different climates, shows two peaks related to the following climates: warm temperate with precipitation all year round (Cfb), and boreal with warm or cold summers and precipitation all year round (Dfb, Dfc). Almost 97% of all knownI. triangulicepslocations are related to these climates. Thus,I. triangulicepsprefers climates with warm or cold summers without dry periods. Cold winters do not limit the distribution of this nidicolous tick species, which has been recorded in the European Alps and the Caucasus Mountains up to altitudes of 2400 m. Conversely,I. triangulicepsdoes not occur in the Mediterranean area with its hot and dry summers.