Mole crickets are difficult to mistake for anything else. They are rather large at 19-33 mm (0.75-1.3 in). This is the only species that occurs in Iowa. The song is also distinctive. There are long-winged individuals that are able to fly and may be attracted to lights.
Mole Crickets at SINA: https://sina.orthsoc.org/s341a.htm
Northern Mole Cricket at SINA: https://sina.orthsoc.org/351a.htm
Statewide. Occurs throughout most of the eastern U.S.
Wet, usually muddy ground near water bodies where it digs burrows.