A recent presentation entitled “Wisconsin Ticks,” highlighted three tick species in Wisconsin. The webinar was presented by PJ Liesch, the director of the University of Wisconsin Insect Diagnostic Laboratory. While there are more than three types of ticks, there are three of special significance to humans in the state, he said.

Ticks in general are arthropods, which put them in the same family as spiders, centipedes and millipedes. While the larvae emerge with only six legs, they all...