Common Buckeyes are found across the southern United States and in much of Mexico. They have unique forewings, each having two orange bars and two large black eyespots. The caterpillar is dark olive green with white and orange markings. The host and nectar plants can include toadflax, petunia, and penstemon. Here is a Common Buckeye I saw last spring, to look at as I wait for these cool bugs to come back this year.