Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Glaucon Blue butterfly. Gallery Prev Next Sand Creek, Klamath Co, July 1 Summit Blue Euphilotes glaucon AKA Glaucon Blue Size: Up to 1.0 inch wingspan Key ID features: Small. Male blue above with narrow dark wing borders, little or no orange along trailing edge of HW. Female dark brown above with prominent orange zigzag along trailing margin. Both sexes have checked fringe on FW. Below bluish-gray with bold black spots, larger on FW, and broad, connected orange submarginal line on HW. Similar species: Best told from other Euphilotes blues by host-plant association, location and flight period. Host plant: Eriogonum umbellatum (Sulphur-flower buckwheat). Habitat: Well-drained sites where host plant grows, including high plateaus, ridges and roadsides. Range: North Cascades, Curry Co, Jackson Co, Josephine Co, Klamath Co, Deschutes Co, Harney Co Season: Early May to mid-August Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Hoary Comma butterfly. Gallery Prev Next Lost Lake, Linn Co, August 28 Hoary Comma Polygonia gracilis Size: Up to 2 inch wingspan Key ID features: Above orange with black blotches and spots, often with very jagged wing edges, submarginal row of yellow chevrons and brown to black marginal band. HW above has yellow gilded look, with yellow patches within dark orange marginal band. Below dark gray with lighter gray striations, and prominent curved (not sharply pointed) white comma in center of HW. Similar species: Satyr Comma has brown shades below, and barbed white comma on HW. Green comma has green submarginal shading below. Oreas comma has pointed white "v" below. Host plant: Currant species (Ribes ), and Rhododendron albiflorum (white azalea) . Habitat: Forest openings, riparian areas, subalpine meadows, mostly above 3,000 feet. Range: Coast Range, Willamette Valley, Western Cascades, east slope of Cascades, Blue Mtns . Season: Early February to mid-October Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Sylvan Hairstreak butterfly. Gallery Prev Next Frissell Ridge, Lane Co, July 17 Sylvan Hairstreak Satyrium sylvinus Size: 1.0 - 1.25 inches wingspan Key ID features: Warm, toasty brown above. Below, lighter gray-brown with median pale black spot band. On HW below, dash or checkmark spot next to blue patch below tail. Blue patch not edged in orange inwardly. HW and FW below with vague submarginal band of black lines, only two or three of which are edged outwardly with orange near tail. Similar species: California HS is generally more boldly marked, has black V-shaped spot next to the blue patch (not checkmark or dash), has orange on the inward edge of the HW blue patch, and has orange halos on black crescents along most of the outer margin below, often including the forewing . Host plant: Willows (Salix sp.) . Habitat: Meadows, willow stands, and canyon slopes near water. Range: East slope of Cascades, most of SE and SW Oregon except Gilliam, Morrow and Umatilla counties and Wallowa Mtns. Season: Early May to mid-September Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Great Copper butterfly. Gallery Prev Next West Eugene Wetlands, Lane Co, July 25 - female Great Copper Tharsalea xanthoides AKA Lycaena xanthoides Size: 1.25- 1.75 inches wingspan Key ID features: Large for a copper. May have very short tail. Female above gray-brown with tan patches, black spots, and orange lunules (series of crescent shapes) on the trailing edge of the HW. Male above gray-brown, with only a few small spots along HW trailing margin. Below HW grayish brown with black spots, submarginal white band, and pale zigzag orange line along VHW trailing margin. Female with bolder zigzag orange line along VHW trailing margin. Often has a noticeable though small tail. Similar species: Edith's Copper is smaller, often with darker dorsal ground color, and VHW spots are larger and closer together . Edith's tend to have no tail or a tiny stub of a tail. Host plant: Dock (Rumex ) species are suspected. Habitat: Grassy hillsides in the south, wet meadows in the Willamette Valley. Range: South Siskiyou Mtns, southern Willamette Valley. Season: Mid-June to early September Abundance: Locally common Conservation Status: Secure throughout most of its range, but population in southern Willamette Valley is perilously small.

Photos, flight season, distribution and host plant information, conservation status, and identification tips for Small Wood Nymph. Gallery Prev Next Mill Cr Rd, Lane Co, August 9 Sylvan Wood Nymph Cercyonis silvestris AKA Sylvan Satyr Size: Up to 1.75 inch wingspan Note: this species, formerly assumed to be a west-side segregate of Great Basin Wood Nymph, was recently clarified by DNA analysis to be a distinct species. Key ID features: Above grayish-brown usually with two eye spots on FW. Below, striated chocolate brown with one to several small eyespots on HW, two eyespots on FW, lower spot usually noticeably smaller than upper spot. Dark median line on HW sometimes indistinct, less erratically jagged than on Small Wood Nymph. Similar species: Great Basin Wood Nymph is slightly larger, more grayish below, with more prominent HW median bands below, and HW median line more distinct and jagged. Small Wood Nymph is typically somewhat smaller and darker, with more distinct and more jagged VHW median line, and usually with significantly smaller lower eyespot. Host plant: Undetermined grass species. Habitat: Openings in forested habitats, and along forest roads in foothills and mountains. Range: West slope of the Cascades in Linn, Lane, Douglas,and Jackson counties. Season: Late July to late September Abundance: Locally common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Pink-edged Sulphur butterfly. Gallery Prev Next Lake Cr Trail, Deschutes Co, July 3 - male Pink-Edged Sulphur Colias interior Size: 1.5 - 2.0 inches wingspan Key ID features: Male above, solid black wing borders. Female above, smudgy FW border, can be either pale yellow or white. Below, HW yellow, with little or no black scaling, and discal spot single-rimmed with no satellite. Usually with bright pink wing fringes. Flight pattern is more relaxed than other sulphurs. Perhaps the most important clue for ID is the pattern of dark over-scaling on the ventral hindwing: often light overall and more dense toward the thorax and gradually fading out past the discal spot . Similar species: Other similar sulphur species in Oregon lack the gradual decrease in the density of overscaling on the dorsal hindwing (see above). Clouded Sulphurs have double ring around discal spot on HW below. Western Sulphurs greenish on HW below. Queen Alexandra's Sulphurs are larger, have more pointed wings, heavier black overscaling below with a strong greenish cast, and lighter pink wing borders. Host plant: Various species of Vaccinium (huckleberry). Habitat: Mid-elevation forest clearings, meadows marshes and heathlands. Range: Central OR Cascades and Blue Mountains. Season: Early June to mid-September Abundance: Uncommon Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Common Roadside Skipper. Gallery Prev Next Mill Cr Rd, Lane Co, July 1 Common Roadside Skipper Amblyscirtes vialis Size: Up to 1 inch wingspan Key ID features: Tiny and difficult to see until perched . Above, dark brown with a few white spots at leading edge near wingtip, fringes often checked. Below dark brownish gray, with gray frosted look in outer half of HW. Similar species: Darker and more marked than Dun Skipper, and more triangular shape. Common Sootywing has more white spots above and white face. Host plant: Many grass species. Habitat: Roadsides, and other warm, sunny sites, often near water. Range: Cascade Range, north Coast Range, Ochoco Mtns, Blue Mtns, Wallowa Mtns. Season: Late April to late August Abundance: Uncommon Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Asher's Blue butterfly. Gallery Prev Next Meltolius River, Deschutes County, May 25 Asher's Blue Celastrina asheri Size: 0.9 - 1.1 inches wingspan Key ID features: This a recently described species (2021). Male hazy blue above, with no black markings. Female dusky-blue, often extensively darkened above. Dorsal wing fringes may be somewhat or heavily darkened. Below, dusky-gray, with extremely variable black and gray markings. Discal hindwing spots are swollen and elongated compared to Echo Azure, and all discal hindwing spots may be expanded and or fused with each other. Similar species: Distinguished from Echo Azure by its smaller size, shorter and more rounded wings, with the ventral ground color being dusky to gray, discal spots larger than in C. echo, and often with darker gray patches of various shapes and sizes. Host plants: r ed osier dogwood and possibly oceanspray . Habitat: Shrubby habitats and riparian areas. Range: Has been documented in Baker, Clackamas, Crook, Grant, Harney, Hood River, Jefferson, Sherman, Umatilla, Union, Wallowa, and Wasco counties. Further field study is needed to better understand the distribution in Oregon. Season: Late March to late July, peaking in early May at lower elevations, and in early June at higher elevations Abundance: Can be locally common near host plant. Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Lilac-bordered Copper butterfly. Gallery Prev Next Mt. Ashland Road, Jackson Co, July 9 - female Lilac-Bordered Copper Tharsalea nivalis AKA Lycaena nivalis Size: 1 - 1.25 inches wingspan Key ID features: Male above brownish with orange zigzag line on trailing margin. Female above light orange with black spots and borders. HW below two-toned, creamy yellow next to the body, and lilac in the outer half, with vague zigzag orange line (colors brighter in female). Similar species: Purplish lacks distinctive two-toned HW below. Other coppers have white or grayish undersides. Host plant: Knotweeds (Polygonum). Habitat: Mountain meadows, openings in fir and pine forests . Range: All of Oregon's mountains except Coast Range. Season: Mid-May to late August Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Pine White butterfly. Gallery Prev Next 3 Creeks Sno-Park, Deschutes Co, August 19 - male Pine White Neophasia menapia Size: 1.5 - 2.0 inches wingspan Key ID features: Bright white with black leading margin and tip of forewing. Underside of HW has veins outlined in black. Underside of female hindwing outlined in red-orange. Notably graceful flight pattern. Similar species: Mustard (margined) white has more delicate dark markings on veins below and lacks heavy black marks above Host plant: Douglas fir, Ponderosa pine and other pine species. Habitat: Fir and pine forests, and in some urban areas near pines. Range: Western Oregon and Ochoco Mtns, Blue Mtns and Wallowa Mtns. Season: Late June to mid-October Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Purplish Copper butterfly. Gallery Prev Next King Mountain Rd, Harney Co, June 13 - male Purplish Copper Tharsalea helloides AKA Lycaena helloides Size: 1 - 1.25 inches wingspan Key ID features: Male above brownish with purple iridescence when fresh. Female above light orange with black spots and wide brown borders. Male and female HW below lavender with submarginal orange zigzag line (females darker); FW below with black spots. Similar species: Lilac-bordered has distinctive two-toned HW below. Other coppers have white or grayish undersides. Host plant: Docks (Rumex ) and Knotweeds (Polygonum). Habitat: Wide variety of habitats . Range: All of Oregon. Season: Late April to mid-October Abundance: Common Conservation Status: Secure