Germany, Austria, Slovakia, Switzerland. We saw very few when we were living right next to a forest. In a city, it meant you either have bad neighbours (could b

Germany, Austria, Slovakia, Switzerland. We saw very few when we were living right next to a forest. In a city, it meant you either have bad neighbours (could be a construction site across the street), or your place is filthy :) Friends at university said they have plenty in dorms, but a visit made it self-explanatory.