With the exception of the cantons of Geneva and Ticino, the whole of Switzerland is considered a risk area. The map of the Federal Office of Public Health (FOPH) shows in detail where ticks occur.
They live in forests of the Central Plateau in the undergrowth, at forest edges, on forest clearings and also near rivers and in parks close to forests up to an altitude of about 1,500 metres above sea level.
Ticks become active as soon as it becomes warm and humid outside, so it is especially important to protect yourself outdoors from March to November.