© G Revey - E Shannon

Appearance: Has small fine tails. Above, males are purple-blue, females slate gray. Tail spots when present are not conspicuous. Below, black spots are either indistinct or missing and one indistinct orange tail spot. (Eastern Tailed-blue has 2 orange spots, one near the tail and black submarginal spots)

Size: Small; 7/8-1 3/16 inches

Habitat: Moist habitats from plains to sub-alpine

Season: 1 brood, May to June

Larval Foodplant: Legumes, especially vetches and locoweed.

Did You Know...
Tails on this Blue are an example of convergent evolution with hairstreaks (Pyle, 2002).