2025 MURAL SPECIES!

karner blue

Plebejus samuelis


STATUS:

US STATUS:  LE - Listed Endangered

MI STATUS: T - Threatened (Legally Protected)

Description:

A small silvery butterfly with a 0.9 - 1.3 inch (2.2-2.3 cm) wingspan. The dorsal (top) surface is silvery blue in males with a narrow, dark border and white fringe. Females range from dull violet to bright purplish blue near the body and central portions of the wings; the remainder of the wing can range from light to dark gray-brown. The hindwing of the female also has a row of dark spots with orange crescents along the outer edge. The ventral (bottom) surface of both sexes is grayish fawn to pearly gray with several rows of small black spots on the inner portions of both wings and a row of metallic blue-green, orange, and black spots just inside the outer margin of both wings, becoming less pronounced in the forewing.

Habitat and Occurrence

If you’re looking to find a Karner Blue for yourself, check within the following ecosystems within the green counties on the map!

All information on this page is generously provided by the Michigan Natural Features Inventory (MNFI). For more information about Karner Blues - visit the species description here: mnfi.anr.msu.edu/karner-blue. To learn more about Michigan’s biodiversity, ecological communities and natural heritage, visit mnfi.anr.msu.edu

get involved with karner blue conservation!

While there are currently no Community Science projects specifically operating to benefit the preservation of Karner Blues in Michigan, there are many organizations who work to protect the habitats where they reside! Volunteer with some of these organizations and help protect the habitat that Karner Blues need in order to survive.

report an observation

MNFI stewards the Michigan Natural Heritage Database and track observations of some of Michigan’s rarest forms of life to fully understand the population and range of rare species to protect biodiversity in Michigan. If you have encountered a Karner Blue, you can share the location information with these trusted conservation professionals here: mnfi.anr.msu.edu/species/report

conservation organizations