Fig. 1

The geographical distribution of suitable environmental conditions for the tick Ixodes ricinus in the western Palaearctic, as obtained with the coefficients from the logistic regression shown in Table 1 and applying a grid of 0.05° to the complete target territory a. The method has potential not only to map such suitable conditions but to overlay with administrative divisions allowing the planning of active surveys in territories yet undetected but with positive suitability (b, from the square in a). It has also a potential for decisions makers to apply effective measurements of impact at defined territories. Because the grid covering the territory, trends of weather can also be evaluated, together with the variables shaping the distribution of a given species of tick