US Counties within Illinois in which the eastern Massasauga, is known to or is believed to occur:

State County
Illinois Bond
Illinois Clinton
Illinois Cook
Illinois Fayette
Illinois Knox
Illinois Lake
Illinois Madison
Illinois Piatt
Illinois Warren
Illinois Will

This report contains Counties in which this species is known to or is believed to occur. If you are looking for the Section 7 range (for Section 7 Consultations), please visit the IPaC application.