Edwards Hairstreak, Satyrium edwardsii

Edwards Hairstreak

Satyrium edwardsii

Below, the Edwards’ Hairstreak is brownish gray, with a row of darker ovals on the front wing, not connected into a band, and ringed with white. On the back wing, there is a row of submarginal orange crescents, not as prominent as in the Coral or Acadian Hairstreaks, interrupted by a blue spot not ringed with orange, and an obvious tail.

Woodland edges, savanna, and hedgerows that contain a variety of oaks, the main host plant for this species.

Overwintering Strategy:   Eggs

One brood, late June and July and sometimes into early August.

Caterpillar Host Plants:
Oaks (Quercus species)

In open areas with many small oak trees available, this species will often be found perched in the open about three feet from the ground. If there is an abundance of nectar sources such as milkweed available, this species will often be found on these flowers. In more mature woodlands, this species may be found perching high in the trees in a sunny spot, with the males defending their area and lashing out at any other butterfly that may flutter by. Battles with other Edwards’ Hairstreaks may spiral nearly out of sight, with the combatants returning and landing at nearly the same location.

Overwintering Strategy

Two-way migration: Adult migrates from Wisconsin to Central Mexico
Small migration: Adult migrates from Wisconsin to southern US
Immigrant: Adult migrates into Wisconsin from warmer areas and don't fly south in winter
Adult Butterfly: Hibernates overwinter as an adult butterfly
Eggs: Eggs laid on stems, twigs or foot plants overwinter in diapause
Caterpillar: Caterpillars make nests on the base of plants and hibernate until spring
Chrysalis: Caterpillars shed their last skin, form a chrysalis and enter diapause.

For more information, read: Where Do Butterflies Go In Winter?

Further Information:   

 Design A Butterfly Garden
 Take The Butterfly Quiz
 Monarch Life Cycle
 Butterflies and Moths of North America
 Southern Wisconsin Butterfly Assn (NABA)
 The Butterfly Site

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