US Counties within Illinois in which the Least tern, interior pop. is known to or is believed to occur:

State County
Illinois Alexander
Illinois Jackson
Illinois Madison
Illinois Massac
Illinois Monroe
Illinois Pope
Illinois Randolph
Illinois St. Clair
Illinois Union
Illinois Wabash
Illinois White

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.