Calephelis muticum, the swamp metalmark, is a butterfly species in the family Riodinidae. It has small wings that are red-brown and orange colored with silver and black markings.

Small colonies of the swamp metalmark can be found scattered across ten states, and the butterfly's conservation status ranges from vulnerable to possibly extinct in these areas. The swamp metalmark's habitat has decreased in size due to invasive species and human interference, such as the use of pesticides and the conversion of wetlands for commercial use. Conservationists hope that a greater abundance of swamp thistles—one of the butterfly's most important host plants—may lead to an increase in the swamp metalmark population.

...