2026 Interior Alaska Butterfly ID
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43 Terms
Carterocephalus skada (Skada Arctic Skipper)
18–25 mm; hooked antennae; forewing can appear uniformly dark brown in some individuals.
Erynnis persius (Persius Duskywing)
No detailed ID notes captured.
Pyrgus centaureae
No detailed ID notes captured.
Hesperia comma (Common Branded Skipper)
No detailed ID notes captured.
Papilio machaon (Old World Swallowtail)
Approximately 75 mm wingspan; forewing has a dark patch.
Papilio canadensis (Canadian Tiger Swallowtail)
Approximately 70 mm wingspan.
Colias vitabunda (Lively Clouded Sulphur)
About 44 mm; black border patchier; discal spot encircled by a double pink ring.
Colias boothii (Booth’s Sulphur)
About 40 mm; sexes variable in color and markings.
Colias gigantea (Giant Sulphur)
About 46 mm; almost no black border; discal spot encircled by a single pink ring.
Colias palaeno (Palaeno Sulphur)
About 38 mm; black border much reduced; small white spot present.
Euchloe ausonides (Large Marble)
About 39 mm; large pale patches on a green background.
Euchloe creusa (Northern Marble)
About 30 mm; smaller pale patches than Large Marble.
Pontia occidentalis (Western White)
About 40 mm; no similar species noted.
Pieris marginalis (Margined White Complex)
About 40 mm; no similar species; represents a complex of nearly indistinguishable species.
Pieris rapae (Cabbage White)
Introduced agricultural pest on cabbage and broccoli.
Glaucopsyche lygdamus (Silvery Blue)
About 23 mm; wings duskier on the dorsal side.
Plebejus idas (Northern Blue)
About 23 mm; dorsal side all blue; orange and blue lunules on underside.
Icaricia saepiolus (Greenish Blue)
About 23 mm; greenish‑blue wings with brown border; double spot band on both wings.
Agriades optilete (Cranberry Blue)
About 20 mm; many dark hindwing spots and one large orange spot.
Celastrina lucia (Northern Azure)
About 22 mm; darker shading; wings bluer on dorsal side; mottled pattern.
Cupido amyntula (Tailed Blue)
About 22 mm; only blue with hindwing tails; some individuals browner above.
Callophrys augustinus (Brown Elfin)
About 23 mm; dark brown patch; brown outer hindwing often with orange hue.
Callophrys polios (Hoary Elfin)
About 23 mm; hoary gray outer hindwing.
Boloria frigga (Frigga Fritillary)
About 37 mm; dark basal forewing; dark hindwing with violaceous tones.
Boloria polaris (Polaris Fritillary)
About 35 mm; dark spot band and white hourglass spot.
Boloria freija (Freija Fritillary)
About 33 mm; elongate white spot present.
Boloria chariclea (Arctic Fritillary)
About 38 mm; two triangular white spots; vague spot band.
Speyeria atlantis (Atlantis Fritillary)
About 55 mm; many rounded silvery spots.
Boloria alaskensis (Alaskan Fritillary)
About 33 mm; darker; hindwing margin angular.
Erebia mancinus (Taiga Alpine)
About 39 mm; even band margin; some individuals with orange flush.
Erebia epipsodea (Common Alpine)
About 39 mm; black‑spotted bands on both wings.
Erebia discoidalis (Red‑disked Alpine)
About 38 mm; rusty red patches; gray patch; hoary gray border.
Erebia pawlowskii (Yellow‑dotted Alpine)
About 33 mm; broken orange bands; off‑white spots.
Oeneis jutta (Jutta Arctic)
About 45 mm; dark diagonal band; large black‑pupiled orange spots; mottled pale gray/brown.
Oeneis bore (Arctic Grayling)
About 45 mm; brown band with distinct pale veins; darker and smaller; sometimes orange‑tinged.
Coenonympha tullia (Common Ringlet)
About 33 mm; no similar species noted.
Phyciodes pulchella (Field Crescent)
About 30 mm; smaller and duller.
Polygonia faunus (Green Comma)
About 40 mm; very ragged wing edges; darker undersides.
Polygonia gracilis (Hoary Comma)
About 43 mm; smoother wing edges; pale gray undersides.
Aglais milberti (Milbert’s Tortoiseshell)
About 43 mm; no similar species noted.
Nymphalis i‑album (Compton Tortoiseshell)
About 61 mm; compared to commas.
Nymphalis antiopa (Mourning Cloak)
About 60 mm.
Limenitis arthemis (White Admiral)
About 62 mm.