Gallery Prev Next Crescent Mtn, Linn Co, August 8 - male (L), female (R) Anna's Blue Plebejus anna Size: 1.0 - 1.25 inch wingspan ​ Key ID features: Male shiny violet-blue above with black marginal band and white fringe. Female brown above with scalloped orange marginal band, clearer and bolder on HW. Below, light bluish gray with tiny black spots, with row of orange checks, bordered inwardly with black and a small, light patch of iridescent blue, lighter and less clear (or absent) on FW. ​ Similar species: Male Acmon and Lupine Blues have orange band on HW above, and females of those species have no orange on FW above. Melissa Blue has much brighter orange borders and bolder iridescent patches on HW below. Northern Blues not found in Cascades. ​ Host plant: Legumes, especially lupines and lotuses . ​ Habitat: Moist, cool montane meadows and forest openings, and dry meadows among conifers, usually above 3000 ft. ​ ​ Range: Found in Cascade Range, Siskiyou Mtns, Klamath Mtns and Warner Mtns. ​ Season: Early June to mid-October ​ ​ Abundance: Common Conservation Status: Secure

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

Gallery Prev Next Royal Avenue, Lane Co, May 28 Western Tiger Swallowtail Papilio rutulus Size: 2.75 - 3.75 inches wingspan ​ Key ID features: Upperside yellow with vertical black bands, prominent tails, blue chevrons above long single tail. Below, very similar to above, with red-orange shading in yellow marginal spots near the tail. ​ Similar species: Anise Swallowtail has more black on forewing; Pale Swallowtail much paler; Two-tailed Swallowtail is larger, has double tails, broader yellow bands. Host plant: Willows, maples, and many other native trees. ​ Habitat: Riparian areas, canyons, watersides, trail, parks, often near water. ​ Range: Throughout Oregon, often lower than Pale Swallowtail, but sometimes up to 7,000 feet. ​ Season: Mid-April - mid-August ​ Abundance: Very common Conservation Status: Secure

Gallery Prev Next Metolius River, Jefferson Co, June 30 Pacuvius Duskywing Erynnis pacuvius Size: Up to 1.5 inch wingspan ​ Key ID features: Above, FW gray-brown with frosted band and spots, 3-5 tiny hyaline (glassy, translucent) spots on FW. W hen fresh, FW above often has noticeable brown patches. Female FW above often with gray scaling only outside of the dark brown patch in the FW cell area. HW plainer gray-brown sometimes with vague light spots. Below brown with light spots and hyaline spots on FW, few to no small vague spots on HW. ​ Similar species: When fresh, FW above often has noticeable brown patches, which no other Oregon duskywings have. ​ Host plant: Various ceanothus species. ​ Habitat: Shrub lands, dry brushy areas, ponderosa pine/douglas-fir openings. ​ Range: Cascade Range, Siskiyou Mtns, Klamath Mtns, NE Blue Mtns, Wallowa Mtns. ​ Season: Late April to early August ​ Abundance: Common Conservation Status: Secure

Gallery Prev Next W Boundary Rd, Lane Co, April 26 - female Propertius Duskywing Erynnis propertius Size: Up to 1.75 inch wingspan ​ Key ID features: Our largest duskywing. Above, FW gray-brown with frosted bands and spots, 3-6 hyaline (glassy, translucent) spots on FW . FW often appears banded, especially in females. HW plainer gray-brown sometimes with vague light spots. Below brown with light spots and hyaline spots on FW, few to no small vague spots on HW. ​ Similar species: Other duskywings are smaller, and generally less boldy marked. ​ Host plant: Oak species, especially Oregon White Oak (Quercus garryana ), and golden chinkapin (Chrysolepis chrysophylla ) at higher elevations. ​ Habitat: Open areas near oaks or chinkapin. ​ Range: Western Oregon from Cascade Crest to crest of Coast Range. ​ Season: Late March to mid-July ​ Abundance: Common Conservation Status: Secure

Gallery Prev Next Gert Canyon, Wasco Co, May 4, male Pale Crescent Phyciodes pallida Size: Up to 2 inch wingspan ​ Key ID features: Above, orange patches and bands separated by black, much lighter in males. FW fringes checked, HW fringes white. HW above with submarginal band of small black dots circled with orange. Males especially have squarish black bar at middle of FW trailing edge above . Below white, tan and brown bands and patches. ​ Similar species: Pale Crescent is larger than Field or Mylitta. Mylitta lacks squarish black bar at trailing edge of FW above. ​ Host plant: Thistles including Cirsium undulatum . ​ Habitat: Dry foothill gullies, streamsides and canyons. ​ Range: Lower Deschutes River basin, Snake River basin . ​ Season: Mid-April to early August ​ Abundance: Common Conservation Status: Secure

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

Gallery Prev Next Kinney Cr Rd, Jackson Co, May 26 Chalcedona Checkerspot Euphydryas chalcedona Size: Up to 2.75 inch wingspan ​ Key ID features: Above black with alternating red and white spot bands separated by black lines. HW below has red and white bands, which, from the margin run red-white-red-white-white. Submarginal spot band on dorsal HW has larger pale ivory spots than other similar species. ​ Similar species: Edith's checkerspot has red-white-red-red-white band pattern on HW below. Snowberry Checkerspot has smaller spots in the submarginal band on the dorsal HW. ​ Hostplant: Several species in the figwort family, including paintbushes (Castilleja ), penstemons, and monkeyflowers . ​ Habitat: Mountains and high canyons. ​ Range: Warner Mtns, southern Klamath Mtns and in Jackson and Josephine counties along the border with CA . ​ Season: Late April to early August ​ Abundance: Locally common Conservation Status: Secure

Resources: Books Finding Lane County Butterflies Now in it's 4th Edition! When the first edition came out in 2004, this was one of, if not the , first butterfly-finding guides in the US. It is modeled after the popular bird-finding guides that exist for almost every popular birding area in the States. It includes 32 of the best sites for butterflies in Lane County (and a couple just over the line in Linn County). For each site, it describes when to go, how to get there, and species you are likely to find there. Using this guide, you can, with some luck, find all of Lane County's more than 90 species. ​ Available from the Lane County Butterfly Club. Proceeds from sales benefit the Lane County Butterfly Club. ​ Available from 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" are appearing around the country as people realize that people don't want to carry around a 5 pound book in the field. Measuring just 4.5" x 5.5" and weighing in at 3.7 oz., there's no reason NOT to take this with you! ​ Available from the Eugene-Springfield Chapter of the North American Butterfly Association (NABA-ES). Proceeds from sales benefit NABA-ES. ​ Available from NABA-Eugene-Springfield 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 .

Gallery Prev Next Buford Park, Lane Co, June 16 California Sister Adelpha californica Size: Up to 3.5 inch wingspan ​ Key ID features: Above dark brown with narrow white band through FW and HW, thinning toward the end of the abdomen, prominent orange patches near wingtips, separated from wingtip by brown margin. Below bands of orange, white and pale lavender, not crossed by black veins. ​ Similar species: Similar to Lorquin's Admiral, which is black above, has orange all the way to the tip of the FW above, and has bolder bands below crossed by black veins. ​ Host plant: Oak species (Quercus ) and Golden chinkapin (Chrysolepis chrysophylla ) . ​ Habitat: Near oak-lined waterways, in oak stands. ​ Range: Throughout western Oregon, except in low areas at the northern end. ​ Season: late May to late October. ​ Abundance: Common Conservation Status: Secure

Gallery Prev Next Deception Creek Rd, Lane Co, July 3 Edith's Checkerspot Euphydryas editha Size: Up to 2.25 inch wingspan ​ Key ID features: Above black with alternating red and white spot bands separated by black lines. HW below has red and white bands, which, from the margin run red-white-red-red-white. ​ Similar species: Snowberry checkerspot has red-white-red-white-white band pattern on HW below. ​ Host plant: Several species in the figwort family, including paintbushes (Castilleja), penstemons, and monkeyflowers . ​ Habitat: Commonly in s ubalpine and alpine meadows, sage-steppe. Frequently found on the highest point of the area. Also in arid river canyons in spring. ​ Range: Cascade Range, Siskiyous, central Coast Range, parts of the Blue Mtns, Wallowa Mtns, and SE Oregon . ​ Season: Late May to late July ​ Abundance: Common Conservation Status: Secure, except ssp. taylori, which is listed as Endangered under the Endangered Species Act.