Size: Up to 1/4 inch long (unengorged adults; immatures are smaller).
Where/When: Is found in homes and other buildings where bats roost. In absence of normal hosts, may wander into other areas of buildings. Can be found anytime during the year.
Significance: May occasionally bite humans when bats are not available. It is unable to reproduce on human blood. Bat ticks are not a known vector of disease in Minnesota.