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.

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.

Habitat

Open woodlands, and open fields near them.

Flight

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

Abundance

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

Recent Silvery Blue Sightings

Date	County	Reported by
May 20, 2023	Wood	Daniel Jackson
May 18, 2023	Sauk	Scott and Ann Swengel
May 16, 2023	Jackson	Wazee NABA Spring Count

Locations