Here you will find the most valuable field guides and printed information sources for butterflies in Oregon and Lane County. Resources: Books New All-Color 5th Edition Finding Lane County Butterflies 5th Edition now Available ! The new 5th Edition is a significant overhaul of the original book, with 5 new important sites added, 45 new color photos, 10 new color maps, and hundreds of clarifications and improvements throughout. It now includes 30 of the best sites for butterflies in Lane County (and a few just over the line in Linn County). For each site, it describes when to go, how to get there, and which species you are likely to find there. Using this guide, you can, with some luck, find most of Lane County's more than 100 species. Order yours now from the Lane County Butterfly Club. 100% of sales proceeds benefit the Lane County Butterfly Club. Butterflies of Lane County When it was first released in 2002, this pocket-sized field ID guide to the butterflies of Lane County, Oregon was the first of its kind. Other similar "pocket guides" have appeared around the country as publishers realize that people don't want to carry around a 5-pound book in the field. This guide will be replaced by an all new field identification guide that covers all of the Willamette Valley and adjoining foothills-planned to be released in 2026. Sold through the Lane County Butterfly Club. Proceeds from sales benefit the Lane County Butterfly Club. Available from Lane County Butterfly Club . This is the definitive guide for identifying the butterflies of Oregon and Washington. It's chock-full of information about each species, with maps, history, biological information and more. It won't fit in your pocket, but you'll want a copy for reference anyway. Available from Amazon.com . Butterflies of the Pacific Northwest By Robert Michael Pyle and Caitlin LaBar. This is the latest and most comprehensive guide for identifying the butterflies of Oregon and Washington. It's chock-full of information about each species, with maps, history, biological information and more. It won't fit in your pocket, but you'll definitely want a copy anyway. Available from Amazon.com . Butterflies of the Pacific Northwest This is the definitive guide for identifying the butterflies of Oregon and Washington. It's chock-full of information about each species, with maps, history, biological information and more. It won't fit in your pocket, but you'll want a copy for reference anyway. Available from Amazon.com . Butterflies of Oregon Their Taxonomy, Distribution, and Biology By Andrew Warren. This thorough scientific work provides the most in-depth coverage of Oregon's butterfly species and set the groundwork for taxonomy studies and books that followed it. For a deeper dive into Oregon's butterflies, this is your "go to" source. Available from Amazon.com . Warren Book Pocket Guide to the Butterflies of Washington, 3rd ed By Caitlin LaBar. This is a great field guide for identifying the butterflies of Washington. So small and light there's no reason not to take it into the field with you! Available from Amazon.com .

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Compton's Tortoiseshell butterfly. Gallery Prev Next Oregon State Arthropod Collection #0001093061- male Thank you to Dana Ross and Paul Hammond , volunteers at OSAC! Compton Tortoiseshell Nymphalis l-album Size: Up to 3 inch wingspan Key ID features: FW above rusty orange with black patches, dark mustard yellow border and marginal band with black line between. HW brown with broader mustard bands, and white bar at leading edge with dark patches on each side. Below two-toned brown or gray, with darker inner half and lighter striated outer half, blue-gray submarginal band. HW below with flattened silver "v," sometimes reduced or absent. Similar species: Above, white bar on leading edge of HW is unique. Host plant: Birches, willows, and aspens . Habitat: Typically found along streams in forested areas, and in mountain canyons. Range: Wallowa Mtns, and far NE Blue Mtns . Season: Early March to mid-October. Abundance: Scarce, may not breed in Oregon every year. Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Clouded Sulphur butterfly. Gallery Prev Next Gateway alfalfa fields, Jefferson Co, Sep 2 - male Thank you to Dana Ross and Paul Hammond , volunteers at OSAC! Clouded Sulphur Colias philodice AKA: Colias eriphyle Eriphyle's Sulphur Size: 2.0 - 2.5 inches wingspan Key ID features: Pale yellow above with black or dark gray border, lime-green or yellow below. Some females lack yellow pigment and are white with black border above. Forewing below has blackish submarginal spots, hindwing below has submarginal row of brown "eurytheme" spots. Discal spot usually enclosed by double red ring with satellite spot. Similar species: Male Orange Sulphur is shaded with orange. White females very difficult to separate, but in Orange Sulphur they tend to have a bolder dark border on the hindwing above. Western Sulphur has single red ring enclosing the discal spot. Host plant: Many species in the pea family. Habitat: Many types of habitats, both disturbed and undisturbed, but usually not along roads in deep forest. Range: All of eastern Oregon. Season: early May to mid-October Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Green Comma butterfly. Gallery Prev Next Lost Lake, Linn Co, August 1 Green Comma Polygonia faunus Size: Up to 2 inch wingspan Key ID features: Above deep orange with black blotches and spots, often with very jagged wing edges, submarginal row of yellow spots on brown to black marginal band. Below striated bands of gray-brown and gray, and prominent curved (not pointed) white comma in center of HW, often barbed on one end. Similar species: Satyr Comma has brown shades below, and barbed white comma on HW. Hoary comma lacks submarginal shading below. Oreas comma has pointed white "v" below. Host plant: Willows, aspen and alders . Habitat: Conifer forest openings, meadows, roadsides. Range: All of western Oregon , plus Warner Mtns, Ochoco Mtns, Wallowa Mtns and Blue Mtns . Season: Late February to late September Abundance: Common 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 Yuma Skipper butterfly. Gallery Prev Next Ana Reservoir SP, Lake Co, August 1 Yuma Skipper Ochlodes yuma Size: Up to 1.75 inch wingspan Key ID features: Large and plain. Above, tan-orange with graduated dark border . Male with black stigmata on FW, female with light spot band on FW. HW below plain pale tan. Similar species: Large size and unmarked pale tan HW below distinct. Host plant: Primarily American common reed (Phragmites australis ssp. americanus ). Habitat: Near s tands of reeds along streams, seeps and marshes in alkaline lowlands. Range: Summer Lake area in Lake County, Imnaha River canyon in Wallowa County. Season: Early July to early September Abundance: Uncommon Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Hoary Elfin butterfly. Gallery Prev Next Undisclosed location, western Oregon Hoary Elfin Callophrys polios Size: 1.0 - 1.25 inches wingspan Key ID features: Above both sexes gray-brown. Below shades of dark brown. Light white median line, stronger on FW, with strong "frosted" look between HW median line and HW margin. No tails. Similar species: Moss's Elfin lacks strong frosted look between trailing margin and postmedian line. Hostplant: Kinnikinnick (Arctostaphylos uva-ursi ) . Habitat: Open rocky areas in mountains, coastal bluffs and dunes, forest roadsides, always close to Kinnikinnick. Range: Isolated populations in Blue Mtns, coastal Lincoln and Curry counties, and in Linn, Morrow and Wallowa counties. Season: L ate April to late May Abundance: Uncommon Conservation Status: Coastal subspecies C. polios maritima is imperiled in OR

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Peck's Skipper butterfly. Gallery Prev Next Rd 3925, Grant Co, June 30 Peck's Skipper Polites peckius Size: Up to 1.25 inch wingspan Key ID features: Above, dark brown (males darker) with clusters of orange bars, and males with orange-brown on leading edge . FW below dark brown with mustard yellow patches. HW below mottled reddish brown with mustard yellow patches in connected bands. Similar species: HW pattern below is unique. Host plant: Grass species, Kentucky bluegrass, saltgrass, and bromes. Habitat: Wet meadows, roadsides and riparian areas. Range: Wallowa and Blue Mtns. Season: Late June to early August Abundance: Uncommon Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Two-tailed Swallowtail butterfly. Mack's Canyon Boat Launch, Sherman Co, April 30 Gallery Prev Next Two-tailed Swallowtail Papilio multicaudata Size: Over 5 inches wingspan Key ID features: Very large. Upperside mostly yellow with wide bands of yellow on forewing separated by black lines, extra tails, blue chevrons on black band near hindwing margin. Below, very similar to above, with red-orange shading in yellow marginal spots near the tail. Similar species: Western Tiger Swallowtail is smaller and has broader black bands on forewing and single tails. Host plant: Primarily western choke cherry (Prunus virginiana var. demissa). Habitat: Riparian and road corridors, canyons and urban parks and gardens. Range: Throughout eastern and southwestern Oregon. Season: Late March - mid-September Abundance: Common Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Satyr Comma butterfly. Gallery Prev Next Winberry Cr Rd, Lane Co, March 15 Satyr Comma Polygonia satyrus AKA Satyr Anglewing Size: Up to 2.25 inch wingspan Key ID features: Above bright orange with black blotches and spots, jagged wing edges, and dark marginal band, bolder on FW. HW above has yellow patches adjacent to dark marginal band (sometimes missing), and a prominent triangular black spot in the center of the HW. Below jagged bands of striated brown, gray and tan, with prominent white comma mark (tipped on its side) in center of HW, often barbed at both ends. Similar species: Light brown tones below separate this from other comma species. Host plant: Stinging Nettle (Urtica dioica ) . Habitat: In riparian areas, forest openings. Range: Throughout Oregon . Season: Late February to early November. Abundance: Common. Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Oregon Swallowtail butterfly. Gallery Prev Next Lower Deschutes Canyon, Sherman Co, June 25 Thank you to Dana Ross and Paul Hammond , volunteers at OSAC! Oregon Swallowtail Papilio machaon oregonia Size: 2.75 - 3.25 inches wingspan Key ID features: Upperside yellow with black bands, veins, and patches, long single tails, blue chevrons on black band near hindwing margin. On HW above, black "pupil" on red eyespot is at the edge of the red, not centered. Abdomen is yellow on sides with relatively narrow black bands on top and bottom. Below, similar pattern as above, with paler yellow ground color, with reddish-orange halos on some of the HW blue chevrons. Similar species: Anise Swallowtail somewhat smaller, black pupil on HW red eyespots is centered within the red, abdomen is mostly black, with narrow yellow bands on sides. Host plant: Wild tarragon (Artemisia dracunculus ). Habitat: Canyons, hillsides, where host plant is found, and on cliffs, ridges, plateaus and mountains above. Range: Throughout Deschutes, Columbia and Snake River basins. Season: Mid-March to mid-October Abundance: Uncommon Conservation Status: Secure

Photos, flight season, distribution and host plant information, conservation status, and identification tips for the Nevada Cloudywing butterfly. Gallery Prev Next Three Creeks Meadow, Jefferson Co, July 17 Nevada Cloudywing Thorybes nevada AKA Cecropterus nevada AKA Thorybes mexicana AKA Mexican Cloudywing Size: Up to 1.5 inch wingspan Key ID features: Above very dark brown with a few white bars and spots on FW, longer and wider than in other Oregon cloudywings. Below similar to above, dark brown with with a few narrow tan or off-white bars and spots on FW, HW darkly striated. Similar species: Northern Cloudywing has smaller sub-cell white bar on FW, and often the white bars are narrower. Western Cloudywing has narrower white bars on FW above. Host plant: Various clover (Trifolium ) species . Habitat: Damp hillsides, creeksides, clearings in coniferous forest. Range: East slope of Cascade Range from Lane County south to northern Klamath and Lake counties. Season: Mid-May to early July Abundance: Common Conservation Status: Secure