Greenish Blue

Plebejus saepiolus

The Wisconsin DNR lists the Greenish Blue as a species of special concern. In Ebner’s Butterflies of Wisconsin, he listed this species as plentiful north of Door County.

Weekly sightings for Greenish Blue

Identifying characteristics

Above, the male is a blue-green with a thin black margin and a dark bar at the end of the front wing cell. The female is much darker with varying amounts of blue and may have some orange on the hind wing. The female also has a dark bar at the end of the front wing cell. Below, the sexes are essentially the same, witha light gray background and a row of black postmedian and submarginal spots, usually with some orange between the spots bands on the back wing.

Similar species

In Wisconsin this species could be confused with a variety of blues in flight, but most likely would be confused with the Silvery Blue. The Silvery Blue lacks the black bar on the front wings above and has only the postmedian spot band. The Greenish Blue has a black spot bar on the front wing and has two spot bands below.

Habitat

Open, often disturbed areas where Alsike Clover, the host plant of this species, grows.

Flight

The Greenish Blue is single-brooded with individuals flying from early June to late July.

Abundance

This species is listed as a species of special concern in Wisconsin, but may become fairly abundant where it is found.

Early Greenish Blue Sightings

Date County Reported by
Jun 9, 2015 Forest Dan Sonnenberg
Jun 11, 2012 Forest Mike Reese
Jun 12, 2015 Forest Dan Sonnenberg & Doug ...
Jun 12, 2015 Forest Dan Sonnenberg & Doug ...
Jun 16, 2006 Bayfield Mike Reese

Locations

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

Male

East of Cornucopia, WI. June 16, 2006.

Greenish BlueClick to enlarge

East of Cornucopia, WI. June 16, 2006.

Greenish BlueClick to enlarge

Female

East of Cornucopia, WI. June 16, 2006.

Greenish BlueClick to enlarge

Female

East of Cornucopia, WI. June 16, 2006.