This website was created by tick researchers at the University of Wisconsin-Madison to provide members of the public with evidence-based information and guidance on ticks and tick-borne diseases in Wisconsin.
Wisconsin Tick Species
Tick-borne Diseases
The Tick App
Tick Bite PreventionWisconsin Tick Bite Tracker
Tick Updates
April 18, 2025: Adult deer ticks are now out in force. We have several sites where more than 100 were collected in just an hour. Adults are the largest and easiest stage to find so be sure to do your tick checks.
March 6, 2025: It's early but days are warming. Whenever temperatures at ground level get above 40-42, adult blacklegged (deer) ticks will start to be active. These ticks transmit Lyme disease so if you are clearing brush or hiking/walking in forest or forested edges, be sure to do your tick checks.
In the News
ABC News 18 Eau Claire
UW-Madison researchers survey ticks in Eau Claire; also identify lone star tick
Milwaukee NPR interview
Reporting on the warm winter and what we can expect from ticks.
- More News