Updates
March 3, 2020: Warmer temperatures mean that adult deer ticks are now active. Be sure to start tick checks whenever you have been outside.
November 1, 2019: We heard a report of a large number of deer ticks on a dog during a hunting trip in central Wisconsin. Always interested in learning about unusually high numbers at specific locations for this tick.
October 31, 2019: Happy Halloween! In 2019, we documented established populations of the deer tick in every Wisconsin County except for Dodge and Winnebago. In those two counties, we found a very low number. Any forested locations could be a source of deer ticks and Lyme Disease.
August 20, 2019: We have found established populations of deer ticks in every Wisconsin county except for Dodge, Kenosha, and Winnebago. If you know of a location in those counties where you or your pets have picked up deer ticks, please let us know.
Nymphal deer ticks can be in your lawn. We found lots of them in mowed grass near woods while sampling at home sites in Eau Claire, Wisconsin the week of June 18, 2019. 