Silvery Blue

Glaucopsyche lygdamus

In Ebner’s Butterflies of Wisconsin, he notes that the Silvery Blue frequents open woods, but I have found this species in more open areas. In central Wisconsin, this species is usually found in mid to late May while looking for the first Karner Blues of the year. Here they often nectar on the Lupine blossoms, and like the Karner Blues, seldom fly more than a couple feet off the ground.

Weekly sightings for Silvery Blue

Identifying characteristics

Above, the male is a silvery blue with a thin black margin much like some of the other blues. The female is similar with a wider black line. Below, the sexes are essentially the same, with a light gray background and a prominent row of black spots lined with white on both the forewing and the hindwing.

Similar species

In Wisconsin this species should not be confused with any other Blues.


Open woodlands, and open fields near them.


The Silvery Blue is single-brooded and may be found from the middle of May to the middle of June.


This species is not a common butterfly throughout the state, but may become fairly abundant where found.

Late Silvery Blue Sightings

Date County Reported by
Jun 17, 2013 Marquette Dan Sonnenberg
Jun 17, 2010 Jackson Karl and Dorothy Legler
Jun 17, 2006 Door Vic Hitchings
Jun 18, 2013 Calumet D Nussbaum
Jun 20, 2006 Door Tom Poklen


Map showing sighting locations for Silvery Blue
Map key
Silvery BlueClick to enlarge

Bass Lake SNA, Waushara Co., WI. May 26, 2005.

Silvery BlueClick to enlarge

Willow Creek Fisheries Area, Southeast of Wild Rose, Waushara Co., WI. May 20, 2006.

Silvery BlueClick to enlarge

Southwest of Hancock, Waushara Co., WI. May 31, 2003.

Silvery BlueClick to enlarge

West of Wazee Park, Jackson Co., WI. May 17, 2006.

Silvery BlueClick to enlarge

West of Wazee Park, Jackson Co., WI. May 17, 2006.