Ecological investigations on the American dog tick, Dermacentor variabilis, were conducted in two metroparks located in Lucas County, Ohio. Adult tick surveys were conducted in 1989 and 1990. For both years, adult tick activity began in late April, and adult ticks were most abundant from early May to mid-June. Observed activity had ceased by early August, producing a unimodal pattern of activity. Sunny days with temperatures between 24 ° and 32°C were most conducive to adult tick activity, and adult ticks were most abundant on grass trails and in meadows. Using nest boxes inhabited by white-footed mice, immature tick surveys were conducted in 1989 and 1990. For both years, larval abundance peaked in early May and nymphal abundance peaked in late June or early July.
Micher, Kelly M. and Rockett, C. Lee
"Field Investigations on the American Dog Tick, Dermacentor Variabilis, in Northwest Ohio (Acari: Ixodidae),"
The Great Lakes Entomologist, vol 26
Available at: https://scholar.valpo.edu/tgle/vol26/iss1/7