| Image | Species Common Name | Species Scientific Name | Family | Subfamily | Subfamily Common Name | Host Plants | Number of Broods | Diapause Form | Occurrence Period | Areas of Occurrence |
|---|---|---|---|---|---|---|---|---|---|---|
 | California Sister | Adelpha californica | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Quercus (oaks) Q. chrysolepis Q. agrifolia Chrysolepis chrysophyla (golden chinquapin) | 2 | larva | April-May, Sept-Oct | Washington |
 | Arizona Sister | Adelpha eulalia | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Idaho | ||||
 | Milbert's Tortoiseshell | Aglais milberti | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Urtica dioica (stinging nettle) | 1 | adult | June-Aug | Washington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Common Roadside-Skipper | Amblyscirtes vialis | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Poa, Agrostis, Avena, Linola (grasses) | 1 | larva | May-Aug | Wahington, Idaho, Latah County, Whitman County, Lincoln County, Nez Perce County, Spokane County |
 | Pacific Orangetip | Anthocharis sara | Pieridae | Pierinae | Whites | Crucifers | 1 | pupa | March-Aug | Washington |
 | Stella Orangetip | Anthocharis stella | Pieridae | Pierinae | Whites | Arabis (rockcress) | 1 | not reported | April-June | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Mormon Metalmark | Apodemia mormo | Riodinidae | Riodininae | Metalmarks | Eriogonum elatum, E.microthecum (buckwheats) | 1 | larva | Aug-Oct | Wahington, Idaho, Latah County, Whitman County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Sachem | Atalopedes campestris | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Digitaria (crabgrass) Cynodon dactylon (Bermuda grass) Eleusine indica (goose grass) | 2 | adults do not overwinter | May-Oct | Wahington, Idaho Whitman County, Garfield County, Nez Perce County, |
 | Astarte Fritillary | Boloria astarte | Nymphalidae | Nymphalinae | Longwings and Fritillaries | (spotted saxifrage) | 1 | larva | June-Aug | Washington |
 | Meadow Fritillary | Boloria bellona | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola (violets) | 2 | larva | May-Aug | Wahington, Idaho Whitman County, Garfield County, Spokane County |
 | Arctic Fritillary | Boloria chariclea | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola (violets) willows wide variety of host | 1 | larva | June-Sept | Wahington, |
 | Pacific Fritillary | Boloria epithore | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola (violets) | 1 | larva | March-Sept | Wahington, Idaho, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Nez Perce County, Spokane County |
 | Freija Fritillary | Boloria freija | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Ericaceae (heaths: blueberries, bearberries, crowberries, ground bramble) | 1 | larva | May-Aug | Washington |
 | Frigga Fritillary | Boloria frigga | Nymphalidae | Nymphalinae | Longwings and Fritillaries | (shrubby willows) | 1 | not reported | May-July | |
 | Relict Fritillary | Boloria kriemhild | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola (violets) | 1 | not reported | July-Aug | |
 | Silver-bordered Fritillary | Boloria selene | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola palustris (marsh violet) Viola nephrophyllia (bog violet) | 1 | not reported | April-Sept | Wahington, Idaho, Latah County, Nez Perce County, Spokane County |
 | Western Pygmy-Blue | Brephidium exilis | Lycaenidae | Lycaeninae | Blues | Chenopodiaceae Atriplex (saltbush) Chenopodium (pigweed) Salsola (russian thistle) | 2 | pupa | July-Sept | Wahington, |
 | Western Green Hairstreak | Callophrys affinis | Lycaenidae | Lycaeninae | Hairstreaks | Eriogonum umbellatum E.heracleoides E.sphaerocephalum E.elatum (buckewheats) | 1 | pupa | April-July | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Brown Elfin | Callophrys augustinus | Lycaenidae | Lycaeninae | Hairstreaks | heaths; salal, madrona manzanita, kinnikiannick, rhododendron, huckleberry, rose, big basin sagebrush | 1 | pupa | March-July | Wahington, Idaho, Latah County, Whitman County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Barry's Hairstreak | Callophrys barryi | Lycaenidae | Lycaeninae | Hairstreaks | Juniperus scopulorum (rocky mountain juniper) J.occidentalis (western juniper) | 2 | pupa | March-Aug | Washington Whitman County, |
 | Western Pine Elfin | Callophrys eryphon | Lycaenidae | Lycaeninae | Hairstreaks | Pinus ponderosa P.contorta (pine) | 1 | pupa | March-Aug | Wahington, Idaho, Latah County, Whitman County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Juniper Hairstreak | Callophrys gryneus | Lycaenidae | Lycaeninae | Hairstreaks | Juniperus scopulorum (rocky mountain juniper) | 2 | pupa | May-June | Wahington, Idaho, Latah County, Whitman County, |
 | Johnson's Hairstreak | Callophrys johnsoni | Lycaenidae | Lycaeninae | Hairstreaks | Arceuthobium campylopodum (dwarf mistletoe) | 1 | pupa | May-Sept | Wahington, |
 | Moss' Elfin | Callophrys mossii | Lycaenidae | Lycaeninae | Hairstreaks | Sedum spathulifolium S.lanceolatum (stonecrop) S.divergens S.laxum S.oreganum | 1 | pupa | March-July | Wahington, Idaho, Latah County, Whitman County, Garfield County, Spokane County |
 | Nelson's Hairstreak | Callophrys nelsoni | Lycaenidae | Lycaeninae | Hairstreaks | (incense cedar) (junipers) | 1 | not reported | April-Aug | Wahington, Idaho, Latah County, Whitman County, Benewah County, Kootenay County, |
 | Hoary Elfin | Callophrys polios | Lycaenidae | Lycaeninae | Hairstreaks | Arctostaphylos uva-ursi (bearberry) (kinnikinnick) | 1 | pupa | April-June | Wahington, Idaho, Latah County, |
 | Sheridan's Green Hairstreak | Callophrys sheridanii | Lycaenidae | Lycaeninae | Hairstreaks | Eriogonum (buckwheat) | 1 | pupa | April-May | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Thicket Hairstreak | Callophrys spinetorum | Lycaenidae | Lycaeninae | Hairstreaks | Arceuthobium campylopodum A.vaginatum A.americanum (dwarf mistletoe) Pinus ponderosa P.contorta (conifers) | 1 | pupa | April-Aug | Wahington, Idaho, Latah County, Garfield County, Nez Perce County, Spokane County |
 | Arctic Skipper | Carterocephalus palaemon | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | grasses: Calamagrostis, Bromus, others | 1 | larva | May-July | Wahington, Idaho, Palouse Region, Latah County, Benewah County, Kootenay County, Nez Perce County, |
 | Echo Azure | Celastrina echo | Lycaenidae | Lycaeninae | Blues | Ceanothus, Holodiscus, Spiraea,others | 2 | not reported | April-June | Washington Palouse Region, Whitman County, Garfield County, Lincoln County, Spokane County |
 | Spring Azure | Celastrina ladon | Lycaenidae | Lycaeninae | Blues | Vaccinium, Vibernum, other shrubs | 1 | not reported | April-June | Idaho, Palouse Region, Latah County, Benewah County, Kootenay County, Nez Perce County, |
 | Northern Azure | Celastrina lucia | Lycaenidae | Lycaeninae | Blues | Jamesia americana Prunus (osier, dogwood, elderberry, madrona, mountain balm, ocean spray, huckleberry, cherries) Spiraea | 1 | pupa | Feb-Oct | Wahington, |
 | Small Wood-Nymph | Cercyonis oetus | Nymphalidae | Satyrinae | Satyrs | grasses | 1 | larva | June-Aug | Wahington, Idaho, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Common Wood-Nymph | Cercyonis pegala | Nymphalidae | Satyrinae | Satyrs | grasses, probably also sedges | 1 | larva | July-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Great Basin Wood-Nymph | Cercyonis sthenele | Nymphalidae | Satyrinae | Satyrs | grasses | 1 | larva | June-Sept | Wahington, Idaho Whitman County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Sagebrush Checkerspot | Chlosyne acastus | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Chrysothamnus viscidiflorus (green rabbitbrush) Machaeranthera (asters) | 1 | not reported | April-June | Wahington, Idaho Whitman County, Adams County, Garfield County, Nez Perce County, |
 | Gorgone Checkerspot | Chlosyne gorgone | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Helianthus annuus (common sunflowers) | 1 | larva | April-July | |
 | Hoffmann's Checkerspot | Chlosyne hoffmanni | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Aster conspicuus (snowy aster) A. ledophyllus (cascades aster) | 1 | larva | May-Sept | Washington |
 | Leanira Checkerspot | Chlosyne leanira | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Castilleja C.chromosa Cordylanth (indian paintbrushes) | 1 | larva | May-July | |
 | Northern Checkerspot | Chlosyne palla | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Asters, rabbitbrush | 1 | larva | April-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Hayden's Ringlet | Coenonympha haydenii | Nymphalidae | Satyrinae | Ringlets | unknown | 1 | larva | June-July | |
 | Ochre Ringlet | Coenonympha tullia ochracea | Nymphalidae | Satyrinae | Ringlets | native and naturalized grasses | 2 | larva | April-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
| Common Ringlet | Coenonympha tullia | Nymphalidae | Satyrinae | Satyrs | native and naturalized grasses | 2 | larva | April-Sept | Wahington, Idaho, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Queen Alexandra's Sulphur | Colias alexandra | Pieridae | Coliadinae | Sulphurs | Astragalus canadensis A.filipes, A.miser A.purshii A.lenitginosus Medicago sativa (alfala) | 2 | larva | April-Sept | Wahington, Idaho Whitman County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Christina Sulphur | Colias christina | Pieridae | Coliadinae | Sulphurs | Fabaceae Hedysarum sulphurescens Lupinus Thermopsis rhombifolia | 2 | not reported | June-July | |
 | Orange Sulphur | Colias eurytheme | Pieridae | Coliadinae | Sulphurs | alfalfa preferred; also Trifolium, Astragalus,Melilotus, Vicia, Thermopsis | 2 or 3 | larva | May-Oct | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Giant Sulphur | Colias gigantea | Pieridae | Coliadinae | Sulphurs | Salix reticulata (dwarf willows) S.myrtilloides (bog willow) | 1 | larva | June-Aug | Idaho, Latah County, |
 | Pink-edged Sulphur | Colias interior | Pieridae | Coliadinae | Sulphurs | Vaccinium myrtilloides (bog bilberry) V.caespitosum (drawf bilberry) | 1 | larva | June-Aug | Wahington, Idaho, Latah County, Nez Perce County, |
 | Mead's Sulphur | Colias meadii | Pieridae | Coliadinae | Sulphurs | Astragalus alpinus (legumes) Trifolium dasyphyllum T.nanum T.parryi (clover) Meadii (milkweed) | 1 | larva | July-Aug | |
 | Labrador Sulphur | Colias nastes | Pieridae | Coliadinae | Sulphurs | Gaultheria humifusa (alpine wintergreen) Vaccinium (legumes) Astragalus alpinus (alpine milkvetch) | 1 | larva | July-Aug | Washington |
 | Western Sulphur | Colias occidentalis | Pieridae | Coliadinae | Sulphurs | Lathyrus lanszwertii L.nevadensis L.pauciflorus (peavines) Lupinus latifolius L.sericeus (lupines) Melilotus alba (sweet clover) Vicia sativa (spring vetch) | 1 | larva | May-Sept | Wahington, Idaho, Latah County, Nez Perce County, |
 | Pelidne Sulphur | Colias pelidne | Pieridae | Coliadinae | Sulphurs | Vaccinium ssp (huckleberries, blueberries) Gaultheria humifusa (creeping wintergreen) heaths | 1 | not reported | July-Aug | |
 | Clouded Sulphur | Colias philodice | Pieridae | Coliadinae | Sulphurs | Legumes: Hedysarum, Lathyrus, Vicia,Trifolium, Astragalus, Medicago | 2 or 3 | larva | May-Oct | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Western Tailed-Blue | Cupido amyntula | Lycaenidae | Lycaeninae | Blues | Vicia (vetches) Lathyrus (peavines) Astragalus (milkvetch) Oxytropis (locoweeds) | 1 | larva | March-Sept | Wahington, Idaho, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Eastern Tailed-Blue | Cupido comyntas | Lycaenidae | Lycaeninae | Blues | Trifolium repens (white clovers) T.pratense (red clover) Oxytropis (locoweeds) Vicia (vetches) Fabaceae (alfalfa) | 2 or 3 | larva | April-Aug | Wahington, Idaho, Latah County, Adams County, Spokane County |
 | Queen | Danaus gilippus | Nymphalidae | Daniinae | Milkweed butterflies | Asclepias (milkweed) | not reported | May-Sept | Wahington, Idaho Nez Perce County, | |
 | Monarch | Danaus plexippus | Nymphalidae | Daniinae | Milkweed butterflies | Asclepias speciosa (showy milkweed) | 2 or 3 | June-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County | |
 | Reakirt's Blue | Echinargus isola | Lycaenidae | Lycaeninae | Blues | Fabaceae (alfalfa) Melilotis (sweet clover, white clover) Glycyrrhiza lepidota (wild licorice) | June | Wahington, | ||
 | Silver-spotted Skipper | Epargyreus clarus | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Glycyrrhiza lepidota (wild licorice) Robinia pseudoacacia (black lotus) Lotus crassifolios (broad-leafed lotus) | 1 | pupa | May-Sept | Wahington, Idaho, Latah County, Whitman County, Garfield County, Nez Perce County, Spokane County |
 | Common Alpine | Erebia epipsodea | Nymphalidae | Satyrinae | Satyrs | Poa pratensis (bluegrass) Cyperaceae (sedges) | 1 | larva | May-Aug | Wahington, Idaho, Latah County, Garfield County, Nez Perce County, Spokane County |
 | Vidler's Alpine | Erebia vidleri | Nymphalidae | Satyrinae | Satyrs | Cyperaceae (sedges) Calamagrostis rubescens (pine grass) | 1 | not reported | June-Aug | Washington |
 | Afranius Duskywing | Erynnis afranius | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Thermopsis rhombifolia (golden banner) Legumes, lipines, wild peas | 2 | larva | April-June July-Sept | Wahington, Idaho Nez Perce County, |
 | Dreamy Duskywing | Erynnis icelus | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Populus (poplars) Salix (willow) Betula (birch) | 1 | larva | April-July | Wahington, Idaho, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Spokane County |
 | Pacuvius Duskywing | Erynnis pacuvius | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Ceanothus (buckbrush, mountain lilacs) C.velutinus (mountain balm) | 1 | not reported | April-July | Wahington, Idaho, Latah County, |
 | Persius Duskywing | Erynnis persius | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Fabaceae, Lupinus most likely; Salix, Populus | 1 | larva | May-June | Wahington, Idaho, Palouse Region, Latah County, Garfield County, Nez Perce County, Spokane County |
 | Propertius Duskywing | Erynnis propertius | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Quercus garryana (garry oak) | 1 | larva | March-July | Washington |
 | Large Marble | Euchloe ausonides | Pieridae | Pierinae | Whites | Brassicaceae/ Cruciferae (mustards) | 1 | pupa | May-June | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Desert Marble | Euchloe lotta | Pieridae | Pierinae | Whites | Arabis furcata A.sparsiflora A.holboellii Halimolobos whited (rockcress) Crucifers Brassicaceae | 1 | not reported | March-July | Wahington, Idaho Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, |
 | Rocky Mountain Dotted-Blue | Euphilotes ancilla | Lycaenidae | Lycaeninae | Blues | Eriogonum compositum (northern buckwheat) | 1 | pupa | April-Aug | Wahington, Idaho Whitman County, Garfield County, Lincoln County, Nez Perce County, |
 | Western Square-dotted Blue | Euphilotes battoides | Lycaenidae | Lycaeninae | Blues | Eriogonum (buckwheat) | 1 | pupa | May-June | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Pacific Dotted-Blue | Euphilotes enoptes | Lycaenidae | Lycaeninae | Blues | Eriogonum elatum (tall buckwheat) | 1 | pupa | April-Aug | Washington |
 | Glaucon Blue | Euphilotes glaucon | Lycaenidae | Lycaeninae | Blues | Washington | ||||
 | Anicia Checkerspot | Euphydryas anicia | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Scrophulariaceae (snapdragon family) Castilleja (paintbrush) Penstemon (beard-tongue) Collinsia sparsiflora (spinster's blue-eyed mary) | 1 | larva | March-Aug | Washington |
 | Chalcedon Checkerspot | Euphydryas chalcedona | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Penstemon; also Verbascum, Symphoricarpos | not reported | larva | July-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Colon Checkerspot | Euphydryas colon | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Penstemon (beard-tongue) Symphoricarpos albus (snow berries) Verbascum thapsus (mullein) | 1 | larva | April-Aug | Wahington, |
 | Edith's Checkerspot | Euphydryas editha | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Castilleja (paintbrush) Plantains Collinsia (chinese houses) Plantago (plantains) Phrymaceae (monkey flowers) | 1 | larva | April-Aug | Wahington, Idaho, Latah County, Garfield County, Nez Perce County, |
 | Gillette's Checkerspot | Euphydryas gillettii | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Lonicera involucrata (twinberry honeysuckle) Symphoricarpos (snowberries) Castilleja (paintbrush) Valerian Proboscidea (ram's horn) Veronica | 1 | larva | May-July | Idaho Nez Perce County, |
 | Dun Skipper | Euphyes vestris | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Carex Heliphila | 1 | larva | May-Sept | Wahington, Idaho Lincoln County, |
 | Variegated Fritillary | Euptoieta claudia | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola (violets) Passiflora (passionvines) Sedum (stonecrop) | 1 | no winter diapuse | July-Sept | |
 | Mexican Fritillary | Euptoieta hegesia | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Passiflora (passionvines) | 1 | no winter diapuse | May-Oct | |
 | Western Tailed Blue | Everes amyntula | Lycaenidae | Lycaeninae | Blues | Legumes: Vicia, Lathyrus, Astragalus | 1 | larva | April-June | Palouse Region |
 | Eastern Tailed Blue | Everes comyntas | Lycaenidae | Lycaeninae | Blues | Trifolium and other legumes | 1 | larva | June-July | Palouse Region |
 | Silvery Blue | Glaucopsyche lygdamus | Lycaenidae | Lycaeninae | Blues | Lupinus, Vicia, Medicago, Oxytropis, Lotus, Lathyrus, Astragalus | 1 | pupa | April-June | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Arrowhead Blue | Glaucopsyche piasus | Lycaenidae | Lycaeninae | Blues | Lupinus (lupins) Astragalus (locoweed) | 1 | pupa | May-July | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Golden Hairstreak | Habrodais grunus | Lycaenidae | Lycaeninae | Hairstreaks | Chrysolepis chrysophylla (golden chinquapin) Quercus chrysolepis (canyon oak) Q. vaccinifolia (huckleberry oak) Notholithocarpus (tanoak) | 1 | egg | July-Sept | Washington |
 | Northern White-Skipper | Heliopetes ericetorum | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Sphaeralcea (globe mallows) Althaea (hollyhock) malvaceous (bushmallow) | 2 | not reported | April-June Aug-Oct | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Nez Perce County, Spokane County |
 | Western Branded Skipper | Hesperia colorado | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Festuca ovina (sheep fescue) Muhlenbergia (muhly) Stipa (feather grass) Andropogon (beard grass) Lolium (rye grass) Festuca idahoensis (bunch bluegrass) Bromus (bromes) | 1 | not reported | May-Sept | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Juba Skipper | Hesperia juba | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | bunchgrasses, Poa | 1 | adult | May-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Spokane County |
 | Nevada Skipper | Hesperia nevada | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Stipa occidentalis (western needlegrass) | 1 | larva | May-Sept | Wahington, |
 | Mohave Sootywing | Hesperopsis libya | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Atriplex canescens (common saltbrush) Chenopodium (goosefoots) Amaranthus | 1 | larva | July-Aug | |
| hoary elfin | Incisalia polia | Lycaenidae | Lycaeninae | Hairstreaks | Arctostaphylos uva-ursi | 1 | pupa | April-June | Palouse Region |
 | Common Buckeye | Junonia coenia | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Mimulus (monkey flower) Antirrhinum (snap dragons) Veronicas Penstemon (beard-tougue) Castilleja (paintbrush) | 2 | May-Oct | ||
 | Marine Blue | Leptotes marina | Lycaenidae | Lycaeninae | Blues | Legumes weedypeas clovers alfalfa plumbagos sweetpeas wisteria | 1 | May-Aug | ||
 | Viceroy | Limenitis archippus | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Salix amygdaloides (peach leaf willow) S.exigua (sandbar willow) Rosaceae (apple, cherries, plum) Populus (poplars) | 1 | larva | April-Sept | Wahington, Idaho Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, |
 | Lorquin's Admiral | Limenitis lorquini | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Salicaceae (willows) Populus (aspen cottonwood) Rosaceae | 1 | larva | Feb-Oct | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Weidemeyer's Admiral | Limenitis weidemeyerii | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Salicaceae (willows, aspens) Rosaceae (cherries, serviceberries, oceanspray) | 1 | larva | June-Aug | |
 | Tailed Copper | Lycaena arota | Lycaenidae | Lycaeninae | Coppers | Ribes aureum R.velutinum R.californicum (gooseberries) | 1 | egg | June-Aug | |
 | Lustrous Copper | Lycaena cupreus | Lycaenidae | Lycaeninae | Coppers | Oxyria digyna (alpine sorrel) Rumex paucifolius (mountain sorrel) | 1 | larva | May-Aug | Wahington, Idaho Nez Perce County, |
 | Gray Copper | Lycaena dione | Lycaenidae | Lycaeninae | Coppers | Rumex (docks) Polygonum amphibium (water smartweed) | 1 | egg | June-Sept | |
 | Edith's Copper | Lycaena editha | Lycaenidae | Lycaeninae | Coppers | Rumex (sorrel) | 1 | not reported | July | Wahington, Idaho, Palouse Region, Latah County, Garfield County, Nez Perce County, Spokane County |
 | Purplish Copper | Lycaena helloides | Lycaenidae | Lycaeninae | Coppers | Rumex (sorrel), Polygonum (knotweed) | 2 | egg | May-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Blue Copper | Lycaena heteronea | Lycaenidae | Lycaeninae | Coppers | Eriogonum (buckwheat) | 1 | egg | May-Sept | Wahington, Idaho Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Bronze Copper | Lycaena hyllus | Lycaenidae | Lycaeninae | Coppers | Rumex crispus (curled dock) R.acetosa (sorrel) Rumex hydrolapathum (water dock) | 2 | egg | June-Aug | |
 | Mariposa Copper | Lycaena mariposa | Lycaenidae | Lycaeninae | Coppers | Vaccinium (shrubs) Andromeda polifolia (heath) | 1 | egg | May-Sept | Wahington, Idaho, Latah County, Garfield County, Nez Perce County, Spokane County |
 | Lilac-bordered Copper | Lycaena nivalis | Lycaenidae | Lycaeninae | Coppers | Polygonum (knotweed) | 1 | egg | May-Aug | Wahington, Idaho Garfield County, Nez Perce County, |
 | American Copper | Lycaena phlaeas | Lycaenidae | Lycaeninae | Coppers | Oxyria digyna (alpine sorrel) Rumex acetosa (meadow dock) | 1 | egg or larva | Aug-Sept | |
 | Ruddy Copper | Lycaena rubidus | Lycaenidae | Lycaeninae | Coppers | Oxyria digyna (alpine sorrel) Rumex (dock) | 1 | egg | May-Aug | Wahington, Idaho, Latah County, Adams County, Garfield County, Lincoln County, Spokane County |
 | Dainty Sulphur | Nathalis iole | Pieridae | Coliadinae | Sulphurs | Asteraceae (marigolds cosmos) Helenium (sneezeweed) Bidens (beggar's tick) | 1 | not reported | July | Wahington, |
 | Ridings' Satyr | Neominois ridingsii | Nymphalidae | Satyrinae | Satyrs | Bouteloua gracilis (blue grama grasses) Agropyron spicatum (wheatgrass) | 1 | larva | June-Sept | |
 | Pine White | Neophasia menapia | Pieridae | Pierinae | Whites | Pinaceae (pine) Cedrus deodara (cedar of Lebanon) Tsuga heterophylla (western hemlock) | 1 | egg | June-Oct | Wahington, Idaho, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Nez Perce County, Spokane County |
 | Mourning Cloak | Nymphalis antiopa | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Salix, Populus, other hardwoods | 1 | adult | April-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | California Tortoiseshell | Nymphalis californica | Nymphalidae | Nymphalinae | Tortoiseshells | Ceanothus sanguineus | 1 | adult | April, Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Compton Tortoiseshell | Nymphalis vaualbum | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Betula (birches) Salix (willow) Populus (aspens) | 1 | adult | March-Oct | Wahington, Idaho, Latah County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Garita Skipperling | Oarisma garita | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | grasses: Poa, Stipa, others | 1 | larva | June-July | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Benewah County, Kootenay County, Spokane County |
 | Woodland Skipper | Ochlodes sylvanoides | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Festuca idahoensis (blue bunchgrass) graminoids (grasses, wildrye) | 1 | larva | June-Oct | Wahington, Idaho, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Yuma Skipper | Ochlodes yuma | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Phragmites australis (common reed) | 1 | not reported | July-Aug | Wahington, |
 | Chryxus Arctic | Oeneis chryxus | Nymphalidae | Satyrinae | Satyrs | Festuca idahoensis (blue bunchgrass) Carex (sedges) Danthonia spicata (poverty oat grass) Phalaris arundinacea (perennial bunchgrass) Oryzopis (ricegrass) | 1 | larva | May-Aug | Wahington,Spokane County |
 | Jutta Arctic | Oeneis jutta | Nymphalidae | Satyrinae | Satyrs | Carex (sedges) Eriophorum vaginatum (cottongrass) | 1 | larva | June-Aug | |
 | Melissa Arctic | Oeneis melissa | Nymphalidae | Satyrinae | Satyrs | Cyperaceae (sedges) Poaceae (grasses) | 1 | larva | July-Aug | Washington |
 | Great Arctic | Oeneis nevadensis | Nymphalidae | Satyrinae | Satyrs | Poaceae (grasses) | 1 | pupa | May-Sept | Washington |
 | Canadian Tiger Swallowtail | Papilio canadensis | Papilionidae | Papilioninae | Swallowtails | Salix (willow) Populus (poplars) Alnus (alders) Betula (birches) Rosaceae (apple) Prunus emarginata (bittercherry) | 1 | pupa | April-Aug | Wahington, Idaho, Latah County, |
 | Pale Swallowtail | Papilio eurymedon | Papilionidae | Papilioninae | Swallowtails | Ceanothus, Holodiscus discolor, Betula,Prunus, Almelanchier alnifolia, apple | 1 or 2 | pupa | May-July | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Eastern Tiger Swallowtail | Papilio glaucus | Papilionidae | Papilioninae | Swallowtails | Alnus (alders) Betula (birches) Populus (poplars) Salix (willows) | 1 | pupa | April-Aug | Idaho, Latah County, |
 | Indra Swallowtail | Papilio indra | Papilionidae | Papilioninae | Swallowtails | Lomatium (parsley), other Apiaceae | 1 | pupa | March-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Garfield County, Nez Perce County, |
 | Old World Swallowtail | Papilio machaon | Papilionidae | Papilioninae | Swallowtails | Artemisia norvegica (sagewort) Artemisia dracunculus (tarragon) Petasites frigidus (arctic butterbur) | 2 | pupa | March-Oct | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Two-tailed Swallowtail | Papilio multicaudata | Papilionidae | Papilioninae | Swallowtails | Prunus virginianus demissa (chockecherry) Fraxinus viridis (green ash) | 1 | pupa | March-Sept | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Western Tiger Swallowtail | Papilio rutulus | Papilionidae | Papilioninae | Swallowtails | Salix, Populus, Alnus, Malus, Betula, Prunus | 1 or 2 | pupa | May-July | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Anise Swallowtail | Papilio zelicaon | Papilionidae | Papilioninae | Swallowtails | Apiaceae (70% within Lomatium, Angelica, Foeniculum, Heracleum) | 1 | pupa | May-July | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Clodius Parnassian | Parnassius clodius | Papilionidae | Parnassiinae | Parnassians | Dicentra (bleeding heart) | 1 | egg | May-Sept | Wahington, Idaho, Latah County, Whitman County, Garfield County, Nez Perce County, Spokane County |
 | Rocky Mountain Parnassian | Parnassius smintheus | Papilionidae | Parnassiinae | Parnassians | Sedum (stonecrop) | 1 | egg 1st winter larva 2 winter | April-Oct | Wahington, Idaho, Latah County, Garfield County, Nez Perce County, Spokane County |
 | Common Sootywing | Pholisora catullus | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Chenopodium Amaranthus (weedy chenopods) Amaranths (tumbleweed) Atriplex rosea (saltbrush) | 2 | larva | March-Sept | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Northern Crescent | Phyciodes cocyta | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Erigeron philadelphicus (philadelphia fleabane) Aster | 1 or 2 | larva | April-Sept | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Mylitta Crescent | Phyciodes mylitta | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Cirsium (thistle) | 2 | larva | May-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Pale Crescent | Phyciodes pallida | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Cirsium (thistle) | 1 | not reported | April-Aug | Wahington, Idaho Whitman County, Garfield County, Lincoln County, Nez Perce County, |
 | Field Crescent | Phyciodes pulchella | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Aster conspicuu A.ledophyllus (aster) | 1 | larva | May-Sept | Wahington, Idaho, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Nez Perce County, Spokane County |
 | pearl crescent | Phyciodes tharos ssp. pascoe | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Erigeron philadelphicus (philadelphia fleabane) Aster | 1 or 2 | larva | April-Sept | Palouse Region |
 | Margined White | Pieris marginalis | Pieridae | Pierinae | Whites | Arabis (rockcress) Thlaspi arvense (field penny-cress) Barbarea verna (landcress) Cardamine cordifolia (heartleaf bittercress) Rorippa naturtium-aquaticum (watercress) Crucifers (toothwort) Dentaria (bittercress) | 1 | pupa | March-Oct | Wahington, Idaho, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Cabbage White | Pieris rapae | Pieridae | Pierinae | Whites | Brassicaceae/ Cruciferae (mustards) | 3 or 4 | not reported | May-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Russet Skipperling | Piruna pirus | Hesperiidae | Hesperiinae | Dicot skippers or spread-wing skippers | Poaceae (grasses) | 1 | not reported | June-July | |
 | Acmon Blue | Plebejus acmon | Lycaenidae | Lycaeninae | Blues | Legumes (lotuses rattleweeds) Fagopyrum esculentum (buckwheat) | 1 or 2 | not reported | March-Sept | Washington Palouse Region, |
 | Anna's Blue | Plebejus anna | Lycaenidae | Lycaeninae | Blues | Lathyrus torreyi (peavine) Lupinus latifolius (broadleaf lupine) | 1 | egg | June-Oct | Washington |
 | Arctic Blue | Plebejus glandon | Lycaenidae | Lycaeninae | Blues | Saxifraga S.tolmeia (tolmie's saxifrage) Oxytropis (locoweeds) Androsace | 1 | larva | July-Aug | Wahington, |
 | Boisduval's Blue | Plebejus icarioides | Lycaenidae | Lycaeninae | Blues | Lupinus (lupins) | 1 | larva | April-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Northern Blue | Plebejus idas | Lycaenidae | Lycaeninae | Blues | Vaccinium caespitosum (drawf bilberry) Empetrum (crowberry) Ledum (evergreen shrubs) Astragalus (locoweeds) Ericaceae (heaths) | 1 | not reported | June-Oct | Wahington, Idaho Garfield County, Spokane County |
 | Lupine Blue | Plebejus lupini | Lycaenidae | Lycaeninae | Blues | Eriogonum (sulphur and oval-leaved buckwheat) | 1 | larva | May-Aug | Wahington, Idaho, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Melissa Blue (includes Karner Blue) | Plebejus melissa | Lycaenidae | Lycaeninae | Blues | Legumes (lotuses rattleweeds milkvetch) Lupinus Glychirriza lepidota (licorice) Astragalus (locoweed) Medicago sativa (alfalfa) | 2 | egg | April-Sept | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Greenish Blue | Plebejus saepiolus | Lycaenidae | Lycaeninae | Blues | Trifolium (clover) Hedysarum alpinum (alpine sweetvetch) | 1 | larva | April-Aug | Wahington, Idaho, Latah County, Adams County, Benewah County, Garfield County, Kootenay County, Nez Perce County, Spokane County |
 | Shasta Blue | Plebejus shasta | Lycaenidae | Lycaeninae | Blues | Herbaceous (peas lupines locoweeds milkvetch) Legumes (rattleweed clover) | 1 | egg 1st winter larva 2 winter | July-Aug | |
 | Taxiles Skipper | Poanes taxiles | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Poaceae (grasses) | 1 | not reported | May | |
 | Draco Skipper | Polites draco | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Poaceae (grasses) | 1 | pupa | June-July | |
 | Mardon Skipper | Polites mardon | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Festuca idahoensis (idaho fescue) F. rubra (red fescue) | 1 | pupa | May-Aug | Washington |
 | Long Dash | Polites mystic | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Poaceae (grasses) Agrophyron (crested-wheat grass) Phleum (catstail) | 1 | larva | June-Aug | Wahington, Idaho, Latah County, Benewah County, Kootenay County, Lincoln County, Spokane County |
 | Peck's Skipper | Polites peckius | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Poaceae (grasses) Poa pratensis (kentucky bluegrass) Bromes (cheat grasses) Leersia oryxoides (rice cutgrass) | 1 | larva | June-Aug | Wahington, Idaho, Latah County, Nez Perce County, |
| Sandhill Skipper | Polites sabuleti | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Festuca idahoensis (idaho fescue) Distichlis spicata | |||||
 | Sonora Skipper | Polites sonora | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Distichlis spicata (saltgrass) Cynodon dactylon (bermuda grass) | 1 | larva | May-Aug | Wahington, Idaho Whitman County, |
 | Tawny-edged Skipper | Polites themistocles | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Poaceae (grasses) Poa pratensis (kentucky bluegrass) Panicum | 1 | unsure if larva or pupa see pg 93 butterflys of cascadia | May-Aug | Wahington, |
 | Green Comma | Polygonia faunus | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Salicaceae (Willows), Betula (Birches), Alnus (Alder) Rhododendron occidentale (western azalea) R.albiflorum (white azalea) | 1 | adult | April-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Hoary Comma | Polygonia gracilis | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Salix (willows) Rhododendron albiflorum (white azalea) Ribes aureum (golden current) | 1 | adult | March-Oct | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Oreas Comma | Polygonia oreas | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Salix (willows) Ribes divaricatum (gooseberry) R. sativum (white current) | 1 | adult | Feb-Sept | Washington Whitman County, Garfield County, |
 | Gray Comma | Polygonia progne | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Ribes rotundifolium (gooseberries) Ulmus (elms) | 1 | adult | Aug-Oct | Idaho, Latah County, Nez Perce County, |
 | Satyr Comma | Polygonia satyrus | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Urtica dioica (stinging nettle) humulus lupulus (hops) | 1 | adult | April-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Becker's White | Pontia beckerii | Pieridae | Pierinae | Whites | Brassicaceae/ Cruciferae (mustards) | 2 | pupa | May-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Western White | Pontia occidentalis | Pieridae | Pierinae | Whites | Brassicaceae/ Cruciferae (mustards) | 1 to 3 | not reported | May-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Checkered White | Pontia protodice | Pieridae | Pierinae | Whites | Brassicaceae/ Cruciferae (mustards) | 2 | pupa | June-Sept | Wahington, Idaho, Latah County, Whitman County, Garfield County, Spokane County |
 | Spring White | Pontia sisymbrii | Pieridae | Pierinae | Whites | Arabis (rockcress) Brassicaceae (mustards) | 1 | pupa | March-Aug | Wahington, Idaho Whitman County, Adams County, Lincoln County, Nez Perce County, Spokane County |
 | Grizzled Skipper | Pyrgus centaureae | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Rosaceous herbs (strawberries) Fragaria F.virginiana | 1 | pupa | June-Aug | Wahington, |
 | Common Checkered-Skipper | Pyrgus communis | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Malva rotundifolia (cheeseweed) M.neglecta (common mallow) Sphaeralcea munroana (munro's globemallow) | 2 | larva | April-Sept | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Two-banded Checkered-Skipper | Pyrgus ruralis | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Fragaria/Rosaceous (strawberries) Geum macrophyllum (big leaf avens) | 1 | not reported | March-Sept | Wahington, Idaho, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Nez Perce County, |
 | Acadian Hairstreak | Satyrium acadica | Lycaenidae | Lycaeninae | Hairstreaks | Salix (willows) | 1 | possible misnomer see pg 198 butterflys of cascadia | Idaho Nez Perce County, | |
 | Behr's Hairstreak | Satyrium behrii | Lycaenidae | Lycaeninae | Hairstreaks | Purshia tridentata (antelope brush) | 1 | egg | May-Sept | Wahington, Idaho Lincoln County, |
 | California Hairstreak | Satyrium californica | Lycaenidae | Lycaeninae | Hairstreaks | Quercus (oaks) | 1 | egg | May-Sept | Wahington, Idaho, Latah County, Whitman County, Nez Perce County, Spokane County |
 | Sooty Hairstreak | Satyrium fuliginosum | Lycaenidae | Lycaeninae | Hairstreaks | Lupinus sericeus (silky lupine) | 1 | egg | May-Aug | Wahington, Idaho Garfield County, |
 | Hedgerow Hairstreak | Satyrium saepium | Lycaenidae | Lycaeninae | Hairstreaks | Ceanothus C.velutinus (snowbrush ceanothus) C.integerrimus (deer brush) | 1 | egg | May-Sept | Wahington, Idaho, Latah County, Whitman County, Nez Perce County, Spokane County |
 | Sagebrush Sooty Hairstreak | Satyrium semiluna | Lycaenidae | Lycaeninae | Hairstreaks | none of the books make any mention of either common or scientific name | Washington | |||
 | Sylvan Hairstreak | Satyrium sylvinus | Lycaenidae | Lycaeninae | Hairstreaks | Salix prolixa (mackenzie's willow) S. exigua (sandbar willow) | 1 | egg | May-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Coral Hairstreak | Satyrium titus | Lycaenidae | Lycaeninae | Hairstreaks | Prunus (cherry) | 1 | egg | June-Aug | Wahington, Idaho, Palouse Region, Whitman County, Adams County, Nez Perce County, |
 | Aphrodite Fritillary | Speyeria aphrodite | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola nuttallii (nuttall's violet) | 1 | larva | June-Sept | |
 | Atlantis Fritillary | Speyeria atlantis | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola adunca (early blue violet) V.nuttallii (nuttall's violet) | 1 | larva | June-Sept | Wahington, |
 | Callippe Fritillary | Speyeria callippe | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola nuttallii (nuttall's violet) Artemisia (sagebrush) | 1 | larva | May-Sept | Wahington, Idaho, Latah County, Whitman County, Adams County, Benewah County, Kootenay County, Lincoln County, Spokane County |
 | Coronis Fritillary | Speyeria coronis | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola trinervata (sagebrush violets) v.beckwithii (great basin violet) v.nuttallii (nuttall's violet) | 1 | larva | May-Sept | Wahington, Idaho, Latah County, Garfield County, |
 | Great Spangled Fritillary | Speyeria cybele | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola glabella (stream violet) V.adunca (early blue violet) | 1 | larva | June-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Edwards' Fritillary | Speyeria edwardsii | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola (violet) | 1 | pg 270 butterflys of cascadia; recorded sighting was mistake | ||
 | Great Basin Fritillary | Speyeria egleis | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola nuttallii (nuttall's violet) V.purpurea (goosefoot violet) V.adunca (early blue violet) | 1 | pupa | June-Sept | Wahington, Idaho, Latah County, Garfield County, Spokane County |
 | Northwestern Fritillary | Speyeria hesperis | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola (violet) | 1 | larva | June-Sept | Wahington, Idaho Garfield County, Spokane County |
 | Hydaspe Fritillary | Speyeria hydaspe | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola glabella (stream violet) V.adunca (early blue violet) V. nuttallii (nuttall's violet) V.sempervirens (evergreen violet) | 1 | larva | May-Sept | Wahington, Idaho, Palouse Region, Latah County, Benewah County, Garfield County, Kootenay County, Spokane County |
 | Mormon Fritillary | Speyeria mormonia | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola palustris (marsh violet) | 1 | larva | June-Oct | Wahington, Idaho, Latah County, Benewah County, Garfield County, Kootenay County, Nez Perce County, Spokane County |
 | Zerene Fritillary | Speyeria zerene | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Viola adunca (early blue violet) V.nuttallii (nuttall's violet) V.glabella (stream violet) | 1 | larva | June-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | Gray Hairstreak | Strymon melinus | Lycaenidae | Lycaeninae | Hairstreaks | Legumes, Fragaria, Anaphalis | 2 | pupa | May-Aug | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Mexican Cloudywing | Thorybes mexicana | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Legumes (vetches) Oxytropis (locoweeds) Trifolium (clovers) | 1 | not recorded | May-Aug | |
 | Northern Cloudywing | Thorybes pylades | Hesperiidae | Pyrginae | Dicot skippers or spread-wing skippers | Trifolium (clover) Lespedeza (bush clover) Amorpha californica (california false indigo) Lathyrus (sweet peas) Oxytropis (locoweeds) Bidens (beggar ticks) Medicago sativa (alfalfa) | 1 | larva | May-July | Wahington,Spokane County |
 | European Skipper | Thymelicus lineola | Hesperiidae | Hesperiinae | Monocot skippers or folded-wing skippers | Dactylis glomerata (orchard grass) Agropyron repens (couch grass) Phleum pratense (timothy-grass) | 1 | egg | June-Sept | Wahington, |
 | West Coast Lady | Vanessa annabella | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Mallows, others in Mallow family | 1 | adult | Wahington, Idaho, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County | |
 | Red Admiral | Vanessa atalanta | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Urtica dioica (stinging nettle) Humulus lupulus (hops) Boehmeria (false nettle) | 2 | pupa, adult | May-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Garfield County, Lincoln County, Nez Perce County, Spokane County |
 | Painted Lady | Vanessa cardui | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Compositaceae (usually Canadian, bull thistle) Cirisum (plume thistle) | 2 | do not overwinter | May-Sept | Wahington, Idaho, Palouse Region, Latah County, Whitman County, Adams County, Benewah County, Garfield County, Kootenay County, Lincoln County, Nez Perce County, Spokane County |
 | American Lady | Vanessa virginiensis | Nymphalidae | Nymphalinae | Longwings and Fritillaries | Anaphalis margaritacea (pearly everlastings) others in aster family Antennaria (pussytoes) Gnaphalium (cudweeds) | 2 | do not overwinter | April-Nov | Wahington, Idaho, Latah County, Whitman County, Nez Perce County, |
