The Swamp Metalmark (Calephelis muticum) is listed as a state endangered species in Illinois, Wisconsin, and Ohio. It is listed as threatened in the state of Indiana, and as a special concern species in Iowa and Michigan. The Swamp Metalmark has yet to be considered federally endangered but is at risk of becoming globally extinct.
The host plants are Swamp Thistle (Cirsium muiticum) and Tall Thistle (Cirsium altissimum) when Swamp Thistle is unavailable. The natural habitats are mostly fens, swamps, and similar wetlands. Many of these areas have been lost due to developments, mining, and agricultural needs.
For additional information regarding the Swamp Metalmark, refer to the Chicago Academy of Sciences and the Peggy Notebaert Nature Museum’s Butterfly Restoration Project.
Photo Credit: Doug Taron, Chicago Academy of Science