Red Spotted Purple

Description:

Both sexes of this species are identical except that the females are slightly larger than the males. The upper side of L. a. arthemis is mostly blackish-blue with white postmedian bands across both wings. Some individuals have a row of red submarginal spots, while others have this area being blue. The underside of the wings is a blackish color with a broad white postmedian band. The basal area of both wings contains many red spots. The submarginal area may contain a row of red spots and the marginal area having bluish spots. However, sometimes the submarginal and marginal areas are just a reddish-brown color. — Wikipedia

Habitat:

Preferred host plants: birches, including Betula lenta; Salicaceae, including Salix bebbiana and Populus tremuloides, and Prunus virginiana (Rosacea). — Wikipedia