This is a list of Lepidoptera (butterflies and moths) observed in the U.S. state of Utah.
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- Achemon sphinx moth (Eumorpha achemon)[1]
- American painted lady butterfly (Vanessa virginiensis)[2]
- American snout butterfly (Libytheana carinenta)[2]
- Anise swallowtail butterfly (Papilio zelicaon)[2]
- Aphrodite fritillary butterfly (Speyeria aphrodite)[2]
- Arctic fritillary butterfly (Boloria chariclea)[2]
- Army cutworm (Euxoa auxiliaris)[3]
- Black cutworm (Agrotis ipsilon)[3]
- Black swallowtail butterfly (Papilio polyxenes)[2]
- Bordered patch butterfly (Chlosyne lacinia)[2]
- Cabbage looper (Trichoplusia ni)[4]
- California patch butterfly (Chlosyne californica)[2]
- California sister butterfly (Adelpha californica)[2]
- California tortoiseshell butterfly (Nymphalis californica)[2]
- Callippe fritillary butterfly (Speyeria callippe)[2]
- Clodius parnassian butterfly (Parnassius clodius)[2]
- Common buckeye butterfly (Junonia coenia)[2]
- Compton tortoiseshell butterfly (Nymphalis vaualbum)[2]
- Corn earworm (Helicoverpa zea) - also called the tomato fruitworm[5]
- Coronis fritillary butterfly (Speyeria coronis)[2]
- Diamondback moth (Plutella xylostella)[6]
- Dotted checkerspot butterfly (Poladryas minuta)[2]
- Edith's checkerspot butterfly (Euphydryas editha)[2]
- Edward's fritillary butterfly (Speyeria edwardsii)[2]
- Empress Leilia butterfly (Asterocampa leilia)[2]
- Fall armyworm (Spodoptera frugiperda)[7]
- Field crescent butterfly (Phyciodes pulchella)[2]
- Five-spotted hawkmoth (Manduca quinquemaculata)[8]
- Freija fritillary butterfly (Boloria freija)[2]
- Fulvia checkerspot butterfly (Thessalia fulvia)[2]
- Glassy cutworm (Crymodes devastator)[3]
- Gorgone checkerspot butterfly (Chlosyne gorgone)[2]
- Gray comma butterfly (Polygonia progne)[2]
- Great Basin fritillary butterfly (Speyeria egleis)[2]
- Great spangled fritillary butterfly (Speyeria cybele)[2]
- Green comma butterfly (Polygonia faunus)[2]
- Gulf fritillary butterfly (Agraulis vanillae)[2]
- Hackberry emperor butterfly (Asterocampa celtis)[2]
- Hoary comma butterfly (Polygonia gracilis)[2]
- Hydaspe fritillary butterfly (Speyeria hydaspe)[2]
- Indra swallowtail butterfly (Papilio indra)[2]
- Leanira checkerspot butterfly (Chlosyne leanira)[2]
- Lorquin's admiral butterfly (Limenitis lorquini)[2]
- Milbert's tortoiseshell butterfly (Aglais milberti)[2]
- Monarch butterfly (Danaus plexippus)[2]
- Mormon fritillary butterfly (Speyeria mormonia)[2]
- Mourning cloak butterfly (Nymphalis antiopa)[2]
- Mylitta crescent butterfly (Phyciodes mylitta)[2]
- Nokomis fritillary butterfly (Speyeria nokomis)[2]
- Northern checkerspot butterfly (Chlosyne palla)[2]
- Northern crescent butterfly (Phyciodes cocyta)[2]
- Northwestern fritillary butterfly (Speyeria hesperis)[2]
- Old World swallowtail butterfly (Papilio machaon)[2]
- Painted lady butterfly (Vanessa cardui)[2]
- Pale crescent butterfly (Phyciodes pallida)[2]
- Pale swallowtail butterfly (Papilio eurymedon)[2]
- Pale Western cutworm (Agrotis orthogonia)[3]
- Pallid crescentspot butterfly (Phyciodes picta)[2]
- Pearl crescent butterfly (Phyciodes tharos)[2]
- Pipevine swallowtail butterfly (Battus philenor)[2]
- Queen butterfly (Danaus gilippus)[2]
- Red admiral butterfly (Vanessa atalanta)[2]
- Red-spotted purple butterfly (Limenitis arthemis astyanax)[2]
- Relict fritillary butterfly (Boloria kriemhild)[2]
- Rockslide checkerspot butterfly (Chlosyne whitneyi)[2]
- Rocky Mountain parnassian butterfly (Parnassius smintheus)[2]
- Silver-bordered fritillary butterfly (Boloria selene)[2]
- Small white butterfly (Pieris rapae)[9]
- Soldier butterfly (Danaus eresimus)[2]
- Tropical buckeye butterfly (Junonia genoveva)[2]
- Two-tailed swallowtail butterfly (Papilio multicaudata)[2]
- Variable checkerspot butterfly (Euphydryas chalcedona)[2]
- Variegated cutworm (Peridroma saucia)[3]
- Variegated fritillary butterfly (Euptoieta claudia)[2]
- Viceroy butterfly (Limenitis archippus)[2]
- Weidemeyer's admiral butterfly (Limenitis weidemeyerii)[2]
- West Coast lady butterfly (Vanessa annabella)[2]
- Western bean cutworm (Striacosta albicosta)[10]
- Western tiger swallowtail butterfly (Papilio rutulus)[2]
- White admiral butterfly (Limenitis arthemis)[2]
- White peacock butterfly (Anartia jatrophae)[2]
- White-lined sphinx moth (Hyles lineata)[11]
- Zerene fritillary butterfly (Speyeria zerene)[2]
