Location: Middleville, Michigan
July 25, 2014 12:01 pm
These Beauties are new to my yard this year. I believe they belong to a checkerspot.
We agree that your caterpillar looks exactly like a Baltimore Checkerspot Caterpillar, Euphydryas phaeton, posted to BugGuide, and the chrysalis also looks like a Baltimore Checkerspot Chrysalis posted to BugGuide. According to BugGuide: “The primary larval food source is turtlehead (Chelone glabra), although recent studies have shown that the caterpillars will eat a larger variety of plant species including English plantain (Plantago lanceolata), a common yard weed.” The plant you have documented with the caterpillar appears to be plantain, based on the images on the USDA site.