[Hairstreaks East of the Cascade Mountains of Oregon and Washington]

A gray hairstreak resting upon a previous year's flower head of desert yellow daisy (Erigeron linearis) as observed along the Steelhead Falls Trail, Deschutes Canyon-Steelhead Falls Wilderness Study Area (BLM).......April 25, 2018.

A gray hairstreak on big sagebrush (Artemisia tridentata) as seen along the old railroad embankment along the lower Deschutes River, about one mile above its mouth........April 24, 2005.

An unidentified blue (unknown species) with gray hairstreak (Strymon melinus) on puccoon (Lithospermum ruderale), Eastbank Trail, Lower Deschutes River.......April 24, 2005.