Amphipoea americana (American Ear Moth)
Somewhat under-represented on distribution maps for Minnesota with only 10 other occurrence records 8 of which are simply mentions in reports. Larval hosts are grasses, including corn roots, and sedge none of which are in short supply.

The American ear moth is a moth of the Noctuidae family. It is found from coast to coast in the northern United States and southern Canada, it is also present in the Northwest Territories, south in the west to California, south in the east to Georgia
The wingspan is 28–35 mm. Adults are on wing from July to September depending on the location.
The larvae feed on grasses, sedges and sometimes on the roots of corn.