Myotis sodalis (Indiana Bat) is known to hibernate in Arkansas, but evidence of maternity colonies is lacking. We captured ten Indiana Bats, including reproductive females, in mist-nets at the Black River Wildlife Management Area (BRWMA) in Clay County during 2006. We located one roost via radio-telemetry after affixing a transmitter to one female Indiana bat. Our survey demonstrates that Indiana bat maternity colonies are established in the BRWMA. This area is the most southwesterly maternity habitat of Indiana Bats recorded and the only known maternity colonies in Arkansas.