Sampling for the study in the sympatry zone of Erinaceus europaeus (blue) and E. roumanicus (red). In areas with dense sampling (Prague, Ostrava), not all individuals are displayed owing to space limitations. Country codes: AU, Austria; CZ, Czech Republic; GR, Germany; HU, Hungary; PL, Poland; SK, Slovak Republic. The map was created using the website http://www.mapy.cz.