Sigmoid Prominent
Clostera albosigma fam. Notodontidae (Hodges#7895)
Host plant(s): Found on willow (Salix sp.)
Date(s) and location(s): 16 Sep, 2025 – Johnson’s Shut-ins State Park, Reynolds County, MO
Notes: The first of this species’ caterpillar I have seen, Pete and I found this while doing some beating on willows. This species also hosts on poplar. The sigmoid prominent can be found over most of the U.S. and Canada, but is most concentrated in the Northeastern and upper Midwest regions. At first glance, this individual looks pretty plain, but on closer inspection the colors and patterns are downright striking. From other photos I have seen, these caterpillars are quite variable in appearance.
A Thousand Acres of Silphiums 