Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Spring White butterfly. Gallery Prev Next Dutchman's Peak, Jackson Co, July 15 Spring White Pontia sisymbrii Size: 1.25 - 1.5 inches wingspan Key ID features: Above, male milk-white, female cream to yellowish, both with black checks on wingtips and closed black bar at end of forewing cell. Below, hindwing veins crisply lined with brownish back bars, partially interrupted across the middle. Similar species: Western white has FW cell end bar with white center, and below HW veins less boldly shaded, and lacks slightly interrupted band across veins. Host plant: Wide variety of rockcresses and mustards. Habitat: Rocky desert-steppe, sage lands, subalpine ridges in the Cascades. Range: Throughout eastern Oregon east of the Cascades and in southern Josephine and Jackson counties. Season: Late March to late August Abundance: Widespread, but locally distributed, often seen singly. Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Field Crescent butterfly. Gallery Prev Next Ditch Cr, Morrow Co, September 5 - male Field Crescent Phyciodes pulchella Size: Up to 1 inch wingspan Key ID features: Male above, dark overall, with orange and light orange spots surrounded by black, HW with submarginal band of small black dots circled with orange. Male HW below cream, tan and brown bands and patches, and inconspicuous marginal crescent below midpoint. Female with larger orange and yellow spots, with a near rectangular pale orange vertical bar in FW cell, at leading margin. Female below white with brown patches and irregular red-brown lines, bright submarginal white crescent with brown on both sides. Similar species: Female Northern Crescent lacks light bar in cell at leading edge of FW above. California Crescent has slight indent in FW margin. Host plant: Aster species, including western showy aster (Eurybia conspicua ) and Cascade aster (Eucephalus ledophyllus ) . Habitat: Mountain meadows, seeps, roadsides, forest edges, lowland prairies. Range: Willamette Vallley, Cascade Range, Siskiyou and Klamath Mtns, Steens Mtn, Ochocos, Wallowa Mtns and Blue Mtns. Season: Mid-May to late September Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Brown Elfin butterfly. Gallery Prev Next Grassy Glade, Lane Co, June 25 Brown Elfin Callophrys augustinus Size: 1.0 - 1.25 inches wingspan Key ID features: Above both sexes brown or orangish brown (females), unmarked. Below HW violet to pink scaling over brown, usually two-toned with basal half somewhat darker, rarely with irregular median line, and sometimes light submarginal spot band. Similar species: Thicket HS has prominent "W" in white median line, is blue above, and submarginal spots on HW run entire length of trailing margin. Host plant: Wide range of plants including salal, madrone, manzanita, huckleberry, and many others . Habitat: Pine-oak woodlands, manzanita and salal thickets, sage-steppe, roadside seeps. Range: Most of Oregon except dry bottomlands east of the Cascade Range. Season: Mid-February to Late July Abundance: Uncommon Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Zerene Fritillary butterfly. Gallery Prev Next Mt. Hebo, Tillamook Co, August 13, ssp. hippolyta Zerene Fritillary Argynnis zerene AKA Speyeria zerene Size: Up to 2.75 inch wingspan Key ID features: Orange above with thin black veins, black shading near the body, black irregular lines inwardly, submarginal black spot band and black marking along margin like chain links, bolder on female. Variable below depending on subspecies and location. Often with light tan-brown "disc" on HW with large silvery-white oval spots and warm tan submarginal band. Can also have pinkish/purplish hindwing below, with smaller discal spots than Hydaspe. Similar species: Coronis Fritillary is usually paler above and larger. Callippe Fritillary has more elongated silver spots in the disc below. Hydaspe has larger, more rounded discal spots. Host plant: Violet (Viola ) species, varying by region of state . Habitat: Varies greatly by subspecies, from coastal headlands, to grassy summits, riparian areas and meadows. Range: Throughout mountainous areas of eastern and southwestern Oregon. Season: Early June to late September. Abundance: Uncommon Conservation Status: Coastal subspecies S. z. hippolyta critically imperiled in OR, Federally listed as Threatened.

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Great Spangled Fritillary butterfly. Gallery Prev Next Izee Rd Meadow, Grant Co, July 1 - male Great Spangled Fritillary Argynnis cybele AKA Speyeria cybele Size: Up to 3 inch wingspan Key ID features: Male orange above with thin black veins, black shading near the body, black irregular lines inwardly, and bands of black spots and chevrons near wing edge. Female striking white to cream above with similar black markings as male. Below male has dark orange "disc" on HW with silvery-white spots and warm tan submarginal band. Below female has dark brown disc with silvery-white spots and tan to ivory submarginal band. Similar species: Female Great Spangled is unmistakable. Male has lighter black markings above along wing edge than other greater fritillaries, and silver spots on HW disc below are much smaller in proportion to size of disc (disc looks more empty) in comparison. Host plant: Violets (Viola ) especially Viola glabella (stream violet) . Habitat: Open meadows, openings in oak-pine forest, lower slopes of mountains in eastern Oregon. Range: Western and southwestern Oregon, Ochoco Mtns, Blue Mtns, Wallowa Mtns, Warner Mtns, Steens Mtn, Mt Jefferson area. Season: Early June to early October. Abundance: Common Conservation Status: Secure .

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Cedar Haristreak butterfly. Gallery Prev Next Upper Klamath River, Klamath Co, May 29 Cedar/Juniper Hairstreak Callophrys gryneus Size: 1.0 - 1.25 inches wingspan Key ID features: Found near cedar or juniper trees . Above, gray-brown or reddish brown, sometimes with redder patches near tails. Below, shades of brown, gray, and violet, with white postmedian line that varies from bold to nearly absent. Blue submarginal ("thecla") patches near tails vary in size and brightness, but usually lacking orange. Similar species: Johnson's Hairstreak is darker shade of brown, postmedian white line is bolder with a more pronounced "M" on the HW, and generally only found in and near old growth forest. Host plant: Western redcedar (Thuja plicata ), incense cedar (Calocedrus decurrens ) and western juniper (Juniperus occidentalis ). Habitat: Roadsides, meadows, riparian zones, forest edges and clearings near the host plant. Range: Most of Oregon, but missing from most of Coast Range, Blue Mtns, Wallowas and Malheur County. Season: Late March to early August Abundance: Abundant Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Bauer's Blue butterfly. Gallery Prev Next Alvord Basin, Harney Co, May 29 Bauer's Blue Euphilotes baueri Size: Up to 0.85 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 orange submarginal line edged in black on HW, sometimes as separate spots. Similar species: Best told from other Euphilotes blues by host-plant association, location and flight period. Host plant: Eriogonum ovalifolium (cushion buckwheat). Habitat: Arid deserts with host plant cushion buckwheat. Range: Eastern Harney County, and area around Brothers, Oregon . Season: Early May to early June Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Dreamy Duskywing butterfly. Gallery Prev Next Box Canyon Meadows, Lane Co, July 9 Dreamy Duskywing Erynnis icelus Size: Up to 1.5 inch wingspan Key ID features: Small for a Duskywing. Males have hump at leading edge of FW. Above, FW gray-brown with frosted band and spots, no hyaline (translucent) spots near FW tip as on other Duskywings. HW plainer gray-brown with vague light spots. Below brown with light spots and pale gray patch near FW tip. Similar species: Other duskywings are larger, and have translucent hyaline spots on FW. Host plant: Willows and aspens. Habitat: Open meadows and road cuts, up to mid-elevations. Range: Siskiyou Mtns, Cascade Range, Blue Mtns, Wallowa Mtns, northern Coast Range. Season: Early April to late July Abundance: Uncommon Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Eastern Tailed Blue butterfly. Gallery Prev Next Doral View Little Groundhog Mtn, Lane Co, July 22 - female Eastern Tailed-Blue Cupido comyntas Size: 0.75 - 1.0 inches wingspan Key ID features: Male bright blue above, female dark gray or gray-brown, with coppery-green iridescence when fresh. HW with white fringe and marginal band of black spots with gray borders. Below, gray or bluish-gray, with black spots rimmed with white, variable marginal band of spots and chevrons, orange patches next to small white-tipped tails. Usually shows black cell-end bar on FW above and below. Similar species: Western Tailed-Blue tends to be whiter below 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: Often in weedy, disturbed habitats, but also in native wet meadows and riparian areas. Range: West of the Cascade Range, Wallowa Mtns and NE Blue Mtns. Season: Early April to early August Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Gray Marble butterfly. Gallery Prev Next Eight Dollar Mtn Rd, Josephine Co, June 4 Gray Marble Anthocaris lanceolata Size: Up to 2 inches wingspan Key ID features: White above, with small, sparse black markings on FW. Below, light gray marbling on HW and on FW tip. Outer margin of FW is concave, giving slightly hooked appearance to FW. Similar species: Much larger than other Marbles, lacks orange on forewing of Sara Orangetip. Host plant: Crucifers, including several rockcresses. Habitat: Often found on South-facing slopes, on wooded canyons, gullies, washes, steep-walled ravines. Range: Siskiyou Mtns and Warner Mtns. Season: Early May to early July Abundance: Uncommon Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Gold-hunters Hairstreak butterfly. Gallery Prev Next Kinney Cr Rd, Jackson Co, May 26 Thank you to Dana Ross and Paul Hammond, volunteers at OSAC! Gold-hunter's Hairstreak Satyrium auretorum Size: 1.0 - 1.25 inches wingspan Key ID features: Light brown above. Slightly darker brown below with variable uneven spot bands, and submarginal band of black chevrons, female more strongly marked. Tail barely noticeable, with adjacent blue frosted patch, and one or two of the chevrons with a small orange patch. Similar species: Somewhat similar to Hedgerow HS, which has more defined median line on HW below. Mountain Mahogany HS is more grayish below, often with a more frosted look. Host plant: Oaks (Quercus ), primarily Oregon White Oak (Quercus garryana ) . Habitat: Oak-pine stands and shrubby habitats near oaks. Range: Along California border in Jackson County and SE Klamath County. Season: Early June to mid-July Abundance: Uncommon Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Becker's White butterfly. Gallery Prev Next Summer Lake, Lake County, August 5 Becker's White Pontia beckerii Size: 1.5 - 2.0 inches wingspan Key ID features: Above, white with black markings near tip of forewing. Below, bold greenish borders along veins especially on hindwing. Similar species: Western White is smaller and much less green along veins below. Host plant: A large number of arid land mustards. Habitat: Arid habitats, both disturbed and undisturbed. Range: Primarily east of the Cascade Mtns, with a few records in the Willamette Valley. Season: Mid-March to mid-September Abundance: Common Conservation Status: Secure