Parnassians and Swallowtails (Papilionidae)
Parnassians (Parnassiinae)
Rocky Mountain Parnassian (Parnassius smintheus)
Swallowtails (Papilioninae)
Pipevine Swallowtail (Battus philenor)
Black Swallowtail (Papilio polyxenes)
Anise Swallowtail (Papilio zelicaon)
Indra Swallowtail (Papilio indra)
Eastern Tiger Swallowtail (Papilio glaucus)
Western Tiger Swallowtail (Pterorus rutulus)
Pale Swallowtail (Pterorus eurymedon)
Two-tailed Swallowtail (Pterorus multicaudata)
Spicebush Swallowtail (Papilio troilus)
Giant Swallowtail (Papilio cresphontes)
Whites and Sulphurs (Pieridae)
Whites (Pierinae)
Pine White (Neophasia menapia)
Becker’s White (Pontia beckerii)
Checkered White (Pontia protodice)
Western White (Pontia occidentalis)
Spring White (Pontia sisymbrii)
Cabbage White (Pieris rapae)
Margined White (Pieris marginalis)
Great Southern White (Ascia monuste)
Large Marble (Euchloe ausonides)
Olympia Marble (Euchloe olympia)
Julia Orangetip (Anthocharis julia)
Sulphurs (Coliadinae)
Clouded Sulphur (Colias eriphyle)
Orange Sulphur (Colias eurytheme)
Queen Alexandra’s Sulphur (Colias alexandra)
Mead’s Sulphur (Colias meadii)
Scudder’s Sulphur (Colias scudderi)
Southern Dogface (Zerene cesonia)
White Angled-Sulphur (Anteos clorinde)
Cloudless Sulphur (Phoebis sennae)
Large Orange Sulphur (Phoebis agarithe)
Orange-barred Sulphur (Phoebis philea)
Lyside Sulphur (Kricogonia lyside)
Mexican Yellow (Eurema mexicana)
Sleepy Orange (Abaeis nicippe)
Dainty Sulphur (Nathalis iole)
Gossamer-wing Butterflies (Lycaenidae)
Coppers (Lycaeninae)
Lustrous Copper (Lycaena cupreus)
Gray Copper (Tharsalea dione)
Bronze Copper (Tharsalea hyllus)
Ruddy Copper (Tharsalea rubidus)
Blue Copper (Tharsalea heteronea)
Purplish Copper (Lycaena helloides)
Lilac-bordered Copper (Tharsalea nivalis)
Hairstreaks (Theclinae)
Colorado Hairstreak (Hypaurotis crysalus)
Western Green Hairstreak (Callophrys affinis homoperplexa)
White-lined Green Hairstreak (Callophrys sheridanii)
Juniper Hairstreak (Callophrys gryneus siva)
Thicket Hairstreak (Callophrys spinetorum)
Brown Elfin (Callophrys augustinus)
Moss’ Elfin (Callophrys mossii schryveri)
Hoary Elfin (Callophrys polios)
Western Pine Elfin (Callophrys eryphon)
Coral Hairstreak (Satyrium titus)
Acadian Hairstreak (Satyrium acadica)
California Hairstreak (Satyrium californica)
Striped Hairstreak (Satyrium liparops)
Hedgerow Hairstreak (Satyrium saepium)
Behr’s Hairstreak (Satyrium behrii)
Gray Hairstreak (Strymon melinus)
Leda Ministreak (Ministrymon leda)
Gray Ministreak (Ministrymon azia
Blues (Polyommatinae)
Marine Blue (Leptotes marina)
Western Pygmy-Blue (Brephidium exilis)
Eastern Tailed-Blue (Cupido comyntas)
Western Tailed-Blue (Cupido amyntula)
Echo Azure (Celastrina echo sidara)
Hops Azure (Celastrina humulus)
Arrowhead Blue (Glaucopsyche piasus)
Silvery Blue (Glaucopsyche lygdamus)
Rocky Mountain Dotted-Blue (Euphilotes ancilla)
Rita Dotted-Blue (Euphilotes rita)
Reakirt’s Blue (Echinargus isola)
Melissa Blue (includes Karner Blue) (Plebejus melissa)
Greenish Blue (Plebejus saepiolus)
Boisduval’s Blue (Plebejus icarioides)
Shasta Blue (Plebejus shasta)
Lupine Blue (Plebejus lupini lutzi)
Arctic Blue (Agriades glandon rustica)
Metalmarks (Riodinidae)
Mormon Metalmark (Apodemia mormo)
Nais Metalmark (Apodemia nais)
Brush-footed Butterflies (Nymphalidae)
Snouts (Libytheinae)
American Snout (Libytheana carinenta)
Milkweed Butterflies (Danainae)
Monarch (Danaus plexippus)
Queen (Danaus gilippus)
Longwings (Heliconiinae)
Gulf Fritillary (Agraulis vanillae)
Zebra Heliconian (Heliconius charithonia)
Variegated Fritillary (Euptoieta claudia)
Aphrodite Fritillary (Argynnis aphrodite)
Regal Fritillary (Speyeria idalia)
Edwards’ Fritillary (Argynnis edwardsii)
Coronis Fritillary (Argynnis coronis)
Zerene Fritillary (Speyeria zerene)
Callippe Fritillary (Argynnis callippe)
Atlantis Fritillary (Argynnis atlantis)
Northwestern Fritillary (Argynnis hesperis)
Mormon Fritillary (Argynnis mormonia)
Bog Fritillary (Boloria eunomia)
Silver-bordered Fritillary (Boloria selene)
Frigga Fritillary (Boloria frigga)
Freija Fritillary (Boloria freija)
Arctic Fritillary (Boloria chariclea)
True Brushfoots (Nymphalinae)
Dotted Checkerspot (Poladryas minuta)
Gorgone Checkerspot (Chlosyne gorgone)
Silvery Checkerspot (Chlosyne nycteis)
Northern Checkerspot (Chlosyne palla)
Rockslide Checkerspot (Chlosyne whitneyi)
Graphic Crescent (Phyciodes graphica)
Pallid Crescent (Phyciodes pallida)
Pearl Crescent (Phyciodes tharos)
Northern Crescent (Phyciodes cocyta)
Field Crescent (Phyciodes pulchella)
Fulvia Checkerspot (Chlosyne fulvia)
Texan Crescent (Anthanassa texana)
Variable Checkerspot (Euphydryas anica)
Common Buckeye (Junonia coenia)
Question Mark (Polygonia interrogationis)
Eastern Comma (Polygonia comma)
Satyr Comma (Polygonia satyrus)
Green Comma (Polygonia faunus)
Hoary Comma (Polygonia gracilis)
Gray Comma (Polygonia progne)
Milbert’s Tortoiseshell (Aglais milberti)
Mourning Cloak (Nymphalis antiopa)
California Tortoiseshell (Nymphalis californica)
Red Admiral (Vanessa atalanta)
Painted Lady (Vanessa cardui)
West Coast Lady (Vanessa annabella)
American Lady (Vanessa virginiensis)
Admirals and Relatives (Limenitidinae)
Viceroy (Limenitis archippus)
Weidemeyer’s Admiral (Limenitis weidemeyerii)
Common Mestra (Mestra amymone)
Leafwings (Charaxinae)
Goatweed Leafwing (Anaea andria)
Emperors (Apaturinae)
Hackberry Emperor (Asterocampa celtis)
Satyrs and Wood-Nymphs (Satyrinae)
Canyonland Satyr (Cyllopsis pertepida)
Common Ringlet (Coenonympha california ochracea)
Common Wood Nymph (Cercyonis pegala)
Small Wood Nymph (Cercyonis oetus)
Magdalena Alpine (Erebia magdalena)
Yellow-dotted Alpine (Erebia pawlowskii)
Colorado Alpine (Erebia callias)
Common Alpine (Erebia epipsodea)
Ridings’ Satyr (Neominois ridingsii)
Jutta Arctic (Oeneis jutta)
Melissa Arctic (Oeneis melissa)
Chryxus Arctic (Oeneis chryxus)
Uhler’s Arctic (Oeneis uhleri)
Skippers (Hesperiidae)
Spread-wing Skippers (Pyrginae)
Silver-spotted Skipper (Epargyreus clarus)
Northern Cloudywing (Cecropterus pylades)
Mexican Cloudywing (Thorybes mexicana)
Dreamy Duskywing (Erynnis icelus)
Sleepy Duskywing (Erynnis brizo)
Rocky Mountain Duskywing (Erynnis telemachus)
Horace’s Duskywing (Erynnis horatius
Mottled Duskywing (Erynnis martialis)
Pacuvius Duskywing (Gesta pacuvius)
Funereal Duskywing (Erynnis funeralis)
Afranius Duskywing (Erynnis afranius)
Persius Duskywing (Gesta persius)
Grizzled Skipper (Pyrgus centaureae)
Two-banded Checkered-Skipper (Pyrgus ruralis)
Small Checkered-Skipper (Pyrgus scriptura)
Common Checkered-Skipper (Burnsius communis)
Common Sootywing (Pholisora catullus)
Grass Skippers (Hesperiinae)
Russet Skipperling(Piruna pirus)
Least Skipper (Ancyloxypha numitor)
Garita Skipperling (Oarisma garita)
Morrison’s Skipper (Stinga morrisoni)
Uncas Skipper (Hesperia uncas)
Juba Skipper (Hesperia juba)
Western Branded Skipper (Hesperia colorado)
Ottoe Skipper (Hesperia ottoe)
Leonard’s Skipper (Hesperia leonardus pawnee)
Pahaska Skipper (Hesperia pahaska)
Green Skipper (Hesperia viridis)
Nevada Skipper (Hesperia nevada)
Sachem (Atalopedes campestris)
Rhesus Skipper (Polites rhesus)
Peck’s Skipper (Polites peckius)
Sandhill Skipper (Polites sabuleti)
Draco Skipper (Polites draco)
Tawny-edged Skipper (Polites themistocles)
Crossline Skipper (Polites origenes)
Long Dash Skipper (Limochores mystic)
Sonora Skipper (Polites sonora)
Arogos Skipper (Atrytone arogos)
Delaware Skipper (Anatrytone logan)
Woodland Skipper (Ochlodes sylvanoides)
Taxiles Skipper (Lon taxiles)
Snow’s Skipper (Paratrytone snowi)
Two-spotted Skipper (Euphyes bimacula)
Dun Skipper (Euphyes vestris)
Dusted Skipper (Atrytonopsis hianna)
Bronze Roadside-Skipper (Amblyscirtes aenus)
Oslar’s Roadside-Skipper (Amblyscirtes oslari)
Common Roadside-Skipper (Amblyscirtes vialis)
Orange-headed Roadside-Skipper (Amblyscirtes phylace)
*The City and County of Broomfield was formed in 2001, in part from a portion of Boulder County, and does not yet have a separate county checklist in the Butterflies and Moths of North America website.