Denotes entries with color photo(s)
Denotes entries containing textual species accounts
Clodius Parnassian (Parnassius clodius)
Rocky Mountain Parnassian (Parnassius smintheus)
Pipevine Swallowtail (Battus philenor)
Black Swallowtail (Papilio polyxenes)
Old World Swallowtail (Papilio machaon)
Anise Swallowtail (Papilio zelicaon)
Indra Swallowtail (Papilio indra)
Western Tiger Swallowtail (Papilio rutulus)
Two-tailed Swallowtail (Papilio multicaudata)
Pale Swallowtail (Papilio eurymedon)
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Pine White (Neophasia menapia)
Becker's White (Pontia beckerii)
Spring White (Pontia sisymbrii)
Checkered White (Pontia protodice)
Western White (Pontia occidentalis)
Margined White (Pieris marginalis)
Cabbage White (Pieris rapae)
Large Marble (Euchloe ausonides)
Desert Marble (Euchloe lotta)
Desert Orangetip (Anthocharis cethura)
Stella Orangetip (Anthocharis stella)
Southwestern Orangetip (Anthocharis thoosa)
Clouded Sulphur (Colias philodice)
Orange Sulphur (Colias eurytheme)
Western Sulphur (Colias occidentalis)
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)
Mexican Yellow (Eurema mexicana)
Mimosa Yellow (Eurema nise)
Sleepy Orange (Eurema nicippe)
Dainty Sulphur (Nathalis iole)
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Tailed Copper (Lycaena arota)
American Copper (Lycaena phlaeas)
Lustrous Copper (Lycaena cupreus)
Edith's Copper (Lycaena editha)
Bronze Copper (Lycaena hyllus)
Ruddy Copper (Lycaena rubidus)
Blue Copper (Lycaena heteronea)
Purplish Copper (Lycaena helloides)
Lilac-bordered Copper (Lycaena nivalis)
Colorado Hairstreak (Hypaurotis crysalus)
Golden Hairstreak (Habrodais grunus)
Great Purple Hairstreak (Atlides halesus)
Silver-banded Hairstreak (Chlorostrymon simaethis)
Coral Hairstreak (Satyrium titus)
Behr's Hairstreak (Satyrium behrii)
Sooty Hairstreak (Satyrium fuliginosum)
California Hairstreak (Satyrium californica)
Sylvan Hairstreak (Satyrium sylvinus)
Banded Hairstreak (Satyrium calanus)
Hedgerow Hairstreak (Satyrium saepium)
Western Green Hairstreak (Callophrys affinis)
Sheridan's Green Hairstreak (Callophrys sheridani)
Desert Green Hairstreak (Callophrys comstocki)
Brown Elfin (Callophrys augustinus)
Desert Elfin (Callophrys fotis)
Hoary Elfin (Callophrys polios)
Western Pine Elfin (Callophrys eryphon)
Thicket Hairstreak (Callophrys spinetorum)
Juniper Hairstreak (Callophrys gryneus)
Gray Hairstreak (Strymon melinus)
Leda Ministreak (Ministrymon leda)
Western Pygmy-Blue (Brephidium exile)
Marine Blue (Leptotes marina)
Ceraunus Blue (Hemiargus ceraunus)
Reakirt's Blue (Hemiargus isola)
Western Tailed-Blue (Everes amyntula)
Spring Azure (Celastrina "ladon")
Summer Azure (Celastrina neglecta)
Western Square-dotted Blue (Euphilotes battoides)
Bernardino Dotted-Blue (Euphilotes bernardino)
Ellis' Dotted-Blue (Euphilotes ellisi)
Bauer's Dotted-Blue (Euphilotes baueri)
Mojave Dotted-Blue (Euphilotes mojave)
Rocky Mountain Dotted-Blue (Euphilotes ancilla)
Pallid Dotted-Blue (Euphilotes pallescens)
Rita Dotted-Blue (Euphilotes rita)
Spalding's Dotted-Blue (Euphilotes spaldingi)
Small Dotted-Blue (Philotiella speciosa)
Arrowhead Blue (Glaucopsyche piasus)
Silvery Blue (Glaucopsyche lygdamus)
Northern Blue (Lycaeides idas)
Melissa Blue (Lycaeides melissa)
Greenish Blue (Plebeius saepiolus)
Boisduval's Blue (Plebeius icarioides)
Shasta Blue (Plebeius shasta)
Lupine Blue (Plebeius lupini)
Arctic Blue (Agriades glandon)
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Fatal Metalmark (Calephelis nemesis)
Mormon Metalmark (Apodemia mormo)
Palmer's Metalmark (Apodemia palmeri)
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American Snout (Libytheana carinenta)
Gulf Fritillary (Agraulis vanillae)
Variegated Fritillary (Euptoieta claudia)
Great Spangled Fritillary (Speyeria cybele)
Aphrodite Fritillary (Speyeria aphrodite)
Nokomis Fritillary (Speyeria nokomis)
Edwards' Fritillary (Speyeria edwardsii)
Coronis Fritillary (Speyeria coronis)
Zerene Fritillary (Speyeria zerene)
Callippe Fritillary (Speyeria callippe)
Great Basin Fritillary (Speyeria egleis)
Northwestern Fritillary (Speyeria hesperis)
Hydaspe Fritillary (Speyeria hydaspe)
Mormon Fritillary (Speyeria mormonia)
Silver-bordered Fritillary (Boloria selene)
Relict Fritillary (Boloria kriemhild)
Freija Fritillary (Boloria freija)
Arctic Fritillary (Boloria chariclea)
Dotted Checkerspot (Poladryas minuta)
Fulvia Checkerspot (Thessalia fulvia)
Leanira Checkerspot (Thessalia leanira)
California Patch (Chlosyne californica)
Bordered Patch (Chlosyne lacinia)
Gorgone Checkerspot (Chlosyne gorgone)
Northern Checkerspot (Chlosyne palla)
Rockslide Checkerspot (Chlosyne whitneyi)
Sagebrush Checkerspot (Chlosyne acastus)
Texan Crescent (Phyciodes texana)
Pearl Crescent (Phyciodes tharos)
Northern Crescent (Phyciodes cocyta)
Tawny Crescent (Phyciodes batesii)
Field Crescent (Phyciodes pratensis)
Painted Crescent (Phyciodes picta)
Pale Crescent (Phyciodes pallida)
Mylitta Crescent (Phyciodes mylitta)
Variable Checkerspot (Euphydryas chalcedona)
Edith's Checkerspot (Euphydryas editha)
Satyr Comma (Polygonia satyrus)
Green Comma (Polygonia faunus)
Hoary Comma (Polygonia gracilis)
Gray Comma (Polygonia progne)
Compton Tortoiseshell (Nymphalis vaualbum)
California Tortoiseshell (Nymphalis californica)
Mourning Cloak (Nymphalis antiopa)
Milbert's Tortoiseshell (Nymphalis milberti)
American Lady (Vanessa virginiensis)
Painted Lady (Vanessa cardui)
West Coast Lady (Vanessa annabella)
Red Admiral (Vanessa atalanta)
Common Buckeye (Junonia coenia)
Tropical Buckeye (Junonia genoveva)
White Peacock (Anartia jatrophae)
Red-spotted Purple (Limenitis arthemis)
'Astyanax' Red-spotted Purple (Limenitis arthemis astyanax)
Viceroy (Limenitis archippus)
Weidemeyer's Admiral (Limenitis weidemeyerii)
Lorquin's Admiral (Limenitis lorquini)
California Sister (Adelpha bredowii)
Hackberry Emperor (Asterocampa celtis)
Empress Leilia (Asterocampa leilia)
Nabokov's Satyr (Cyllopsis pyracmon)
Canyonland Satyr (Cyllopsis pertepida)
Common Ringlet (Coenonympha tullia)
Common Wood Nymph (Cercyonis pegala)
Mead's Wood Nymph (Cercyonis meadii)
Great Basin Wood Nymph (Cercyonis sthenele)
Small Wood Nymph (Cercyonis oetus)
Magdalena Alpine (Erebia magdalena)
Colorado Alpine (Erebia callias)
Common Alpine (Erebia epipsodea)
Ridings' Satyr (Neominois ridingsii)
Wyoming Satyr (Neominois wyomingo)
Chryxus Arctic (Oeneis chryxus)
Uhler's Arctic (Oeneis uhleri)
White-veined Arctic (Oeneis bore)
Jutta Arctic (Oeneis jutta)
Melissa Arctic (Oeneis melissa)
Monarch (Danaus plexippus)
Queen (Danaus gilippus)
Soldier (Danaus eresimus)
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Silver-spotted Skipper (Epargyreus clarus)
Hammock Skipper (Polygonus leo)
Short-tailed Skipper (Zestusa dorus)
Northern Cloudywing (Thorybes pylades)
Mexican Cloudywing (Thorybes mexicana)
Dreamy Duskywing (Erynnis icelus)
Sleepy Duskywing (Erynnis brizo)
Rocky Mountain Duskywing (Erynnis telemachus)
Meridian Duskywing (Erynnis meridianus)
Horace's Duskywing (Erynnis horatius)
Mournful Duskywing (Erynnis tristis)
Pacuvius Duskywing (Erynnis pacuvius)
Funereal Duskywing (Erynnis funeralis)
Afranius Duskywing (Erynnis afranius)
Persius Duskywing (Erynnis persius)
Grizzled Skipper (Pyrgus centaureae)
Two-banded Checkered-Skipper (Pyrgus ruralis)
Mountain Checkered-Skipper (Pyrgus xanthus)
Small Checkered-Skipper (Pyrgus scriptura)
Common Checkered-Skipper (Pyrgus communis)
White Checkered-Skipper (Pyrgus albescens)
Northern White-Skipper (Heliopetes ericetorum)
Common Sootywing (Pholisora catullus)
Mohave Sootywing (Hesperopsis libya)
Saltbush Sootywing (Hesperopsis alpheus)
MacNeill's Sootywing (Hesperopsis gracielae)
Russet Skipperling (Piruna pirus)
Garita Skipperling (Oarisma garita)
Edwards' Skipperling (Oarisma edwardsii)
Orange Skipperling (Copaeodes aurantiacia)
Fiery Skipper (Hylephila phyleus)
Uncas Skipper (Hesperia uncas)
Juba Skipper (Hesperia juba)
Western Branded Skipper (Hesperia colorado)
Pahaska Skipper (Hesperia pahaska)
Green Skipper (Hesperia viridis)
Nevada Skipper (Hesperia nevada)
Sandhill Skipper (Polites sabuleti)
Draco Skipper (Polites draco)
Tawny-edged Skipper (Polites themistocles)
Sonora Skipper (Polites sonora)
Sachem (Atalopedes campestris)
Woodland Skipper (Ochlodes sylvanoides)
Yuma Skipper (Ochlodes yuma)
Taxiles Skipper (Poanes taxiles)
Dun Skipper (Euphyes vestris)
Viereck's Skipper (Atrytonopsis vierecki)
Bronze Roadside-Skipper (Amblyscirtes aenus)
Common Roadside-Skipper (Amblyscirtes vialis)
Orange-headed Roadside-Skipper (Amblyscirtes phylace)
Eufala Skipper (Lerodea eufala)
Brazilian Skipper (Calpodes ethlius)
Mojave Giant-Skipper (Agathymus alliae)
Yucca Giant-Skipper (Megathymus yuccae)
Strecker's Giant-Skipper (Megathymus streckeri)
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