Swamp Metalmark

Calephelis mutica

The Swamp Metalmark is a very rare butterfly in Wisconsin and throughout its range. It is listed as endangered, threatened or of special concern in Iowa, Illinois, Indiana, Ohio, and Michigan. In Wisconsin, this butterfly is listed as endangered. There are several ongoing attempts at introducing/reintroducing this butterfly into suitable habitats in Wisconsin and Illinois. I located an unknown colony of this species in northern Marquette County in 1998 but none have been seen at this site since 2001. I have spent much effort trying to locate other colonies in suitable habitat within twenty miles of this colony, but I have had no success.

Additional information about the Swamp Metalmark. is located in a paper by Susan Borkin of the Milwaukee Public Museum

Weekly sightings for Swamp Metalmark

Identifying characteristics

Above; reddish brown with two rows of irregular metallic lines. Below: Much different than the upper surface. A light yellow/brown with black dots and silvery specks.

Similar species

None in Wisconsin.

Habitat

Moist open areas where Swamp Thistle grows.

Flight

One brood; July through early August

Abundance

Rare, a Wisconsin state endangered species.

Early Swamp Metalmark Sightings

Date County Reported by
Jun 30, 2007 Ozaukee NABA count, 12 observers
Jul 4, 2012 Ozaukee Paul Sparks
Jul 8, 2012 Ozaukee Judith Huf
Jul 9, 2005 Ozaukee Sunny Knutson
Jul 9, 2011 Ozaukee Matthew Drollinger

Locations

Map showing sighting locations for Swamp Metalmark
Map key
Swamp MetalmarkClick to enlarge

Northern Kettle Moraine State Forest, Fond du Lac Co., WI. July 14, 2006.

Swamp MetalmarkClick to enlarge

Northern Kettle Moraine State Forest, Fond du Lac Co., WI. July 14, 2006.

Swamp MetalmarkClick to enlarge

Chaffee Creek SNA, Marquette Co., WI. July 11, 1998.

Swamp MetalmarkClick to enlarge

Northern Kettle Moraine State Forest, Fond du Lac Co., WI. July 14, 2004. Puddling.

Swamp MetalmarkClick to enlarge

Northern Kettle Moraine State Forest, Fond du Lac Co., WI. July 14, 2003.