Size: 0.75 - 1.0 inches wingspan
Key ID features: Male bright lavender blue above, female brown or gray-brown, with purple-blue iridescence when fresh. HW with white fringe and often few or no marginal black spots. Below, gray or gray-white, with small black spots rimmed with white, variable marginal band of spots and chevrons, usually one small orange patch adjacent to small blue iridescent patch next to small white-tipped tails.
Similar species: Eastern Tailed-Blue tends to be more gray below, often has more orange on HW below, is smaller, and usually lacks black cell end bar on the FW above.
Host plant: Many species in the pea family including lupines, vetches and clovers.
Habitat: Typically found in native habitats, including wet meadows and riparian areas.
Range: West of the Cascade Range, Siskiyou and Klamath Mtns, Ochoco Mtns, Wallowa Mtns and Blue Mtns.
Season: Late march to mid-September
Conservation Status: Secure