Caterpillar foods: Plants in the Plantain family including Snapdragons (Antirrhinum), Plantain (Plantago), Linaria, Dwarf Snapdragon (Chaenorhinum minus); Agalinis in the Orobancaceae, Ruellia in the Acanthaceae. (Bugguide and personal observation)
Common Buckeyes don’t overwinter in Wisconsin, but they often move north into the state during the summer. Toward the end of the summer I usually see one or two Buckeyes every day – usually resting on our gravel driveway.
Males have more angular forewings, and less rounded hind wings.
Buckeye caterpillar – 9/6/2010
Another view of the same caterpillar
8/16/2019 Caterpillar on the non-native Dwarf Snapdragon (Chaenorhinum minus) which grows in our gravel driveway.
8/21/2019 Caterpillar on Dwarf Snapdragon
9/7/2019 Adult that emerged from the chrysalis