| Acartophthalmus nigrina | Acalyptrate fly | Insecta | Acartophthalmidae | P |
| Acrocera sp. | Small-headed fly | Insecta | Acroceridae | TBD |
| Eulonchus sp. | Small-headed fly | Insecta | Acroceridae | P |
| Ogcodes sp. | Small-headed fly | Insecta | Acroceridae | TBD |
| Pterodontia misella | Small-headed fly | Insecta | Acroceridae | P |
| | Leaf-miner fly | Insecta | Agromyzidae | P |
| Agromyza sp. | Leaf-miner fly | Insecta | Agromyzidae | P |
| Cerodontha sp. | Leaf-miner fly | Insecta | Agromyzidae | P |
| Liriomyza sp. | Leaf-miner fly | Insecta | Agromyzidae | P |
| Ophiomyia sp. | Leaf-miner fly | Insecta | Agromyzidae | TBD |
| Phytobia amelanchieris | Leaf-miner fly | Insecta | Agromyzidae | TBD |
| Phytomyza sp. | Leaf-miner fly | Insecta | Agromyzidae | P |
| | Wood gnat | Insecta | Anisopodidae | P |
| | Root-maggot fly | Insecta | Anthomyiidae | P |
| Anthomyia procellaris | Root-maggot fly | Insecta | Anthomyiidae | C |
| Delia radicum | Cabbage Root Fly, Cabbage Maggot | Insecta | Anthomyiidae | C |
| Delia sp. | Root-maggot fly | Insecta | Anthomyiidae | P |
| Lasiomma sp. | Root-maggot fly | Insecta | Anthomyiidae | P |
| Leucophora sp. | Root-maggot fly | Insecta | Anthomyiidae | P |
| Pegomya sp. | Root-maggot fly | Insecta | Anthomyiidae | P |
| Zaphne sp. | Root-maggot fly | Insecta | Anthomyiidae | P |
| Anthomyza tenuis | Acalyptrate fly | Insecta | Anthomyzidae | TBD |
| Apiocera barri | Flower-loving fly | Insecta | Apioceridae | TBD |
| | Robber fly | Insecta | Asilidae | P |
| Andrenosoma fulvicaudum | Robber fly | Insecta | Asilidae | P |
| Comantella pacifica | Robber fly | Insecta | Asilidae | P |
| Cophura sp. | Robber fly | Insecta | Asilidae | TBD |
| Cyrtopogon bimaculus | Robber fly | Insecta | Asilidae | P |
| Cyrtopogon inversus | Robber fly | Insecta | Asilidae | C |
| Cyrtopogon montanus | Robber fly | Insecta | Asilidae | C |
| Cyrtopogon sp. | Robber fly | Insecta | Asilidae | P |
| Cyrtopogon willistoni | Robber fly | Insecta | Asilidae | P |
| Dioctria pusio | Robber fly | Insecta | Asilidae | P |
| Efferia albibarbis | Robber fly | Insecta | Asilidae | TBD |
| Efferia benedicti | Robber fly | Insecta | Asilidae | P |
| Efferia okanagana | Okanagan Robber Fly | Insecta | Asilidae | C |
| Efferia sp. | Robber fly | Insecta | Asilidae | P |
| Eudioctria sackeni | Robber fly | Insecta | Asilidae | P |
| Laphria aimatis | Bee-mimic robber fly | Insecta | Asilidae | P |
| Laphria asackeni | Bee-mimic robber fly | Insecta | Asilidae | C |
| Laphria asturina | Bee-mimic robber fly | Insecta | Asilidae | P |
| Laphria columbica | Bee-mimic robber fly | Insecta | Asilidae | TBD |
| Laphria fernaldi | Bee-mimic robber fly | Insecta | Asilidae | TBD |
| Laphria ferox | Bee-mimic robber fly | Insecta | Asilidae | TBD |
| Laphria franciscana | Bee-mimic robber fly | Insecta | Asilidae | P |
| Laphria partitor | Bee-mimic robber fly | Insecta | Asilidae | P |
| Laphria sackeni | Bee-mimic robber fly, Sacken's Bee Hunter | Insecta | Asilidae | P |
| Laphria sadales | Bee-mimic robber fly | Insecta | Asilidae | P |
| Laphria sp. | Bee-mimic robber fly | Insecta | Asilidae | P |
| Lasiopogon monticola | Robber fly | Insecta | Asilidae | C |
| Leptogaster sp. | Robber fly | Insecta | Asilidae | TBD |
| Machimus callidus | Robber fly | Insecta | Asilidae | TBD |
| Machimus occidentalis | Robber fly | Insecta | Asilidae | C |
| Megaphorus willistoni | Robber fly | Insecta | Asilidae | TBD |
| Neomochtherus willistoni | Robber fly | Insecta | Asilidae | C |
| Nicocles sp. | Robber fly | Insecta | Asilidae | C |
| Pogonosoma ridingsi | Robber fly | Insecta | Asilidae | TBD |
| Proctacanthus milbertii | Robber fly | Insecta | Asilidae | C |
| Proctacanthus occidentalis | Robber fly | Insecta | Asilidae | P |
| Promachus dimidiatus | Giant robber fly | Insecta | Asilidae | P |
| Stenopogon inquinatus | Robber fly | Insecta | Asilidae | C |
| | Acalyptrate fly | Insecta | Asteiidae | TBD |
| Atherix variegata | Water snipe fly | Insecta | Athericidae | TBD |
| Bibio albipennis | White-winged March Fly | Insecta | Bibionidae | P |
| Dilophus caurinus | March Fly | Insecta | Bibionidae | P |
| Anastoechus barbatus | Bee fly | Insecta | Bombyliidae | P |
| Anthrax irroratus | Spotted Bee Fly | Insecta | Bombyliidae | P |
| Bombylius major | Greater Bee Fly | Insecta | Bombyliidae | P |
| Bombylius sp. | Bee fly | Insecta | Bombyliidae | P |
| Conophorus sp. | Bee fly | Insecta | Bombyliidae | P |
| Exoprosopa sp. | Bee fly | Insecta | Bombyliidae | P |
| Geron sp. | Bee fly | Insecta | Bombyliidae | TBD |
| Hemipenthes catulina | American Morio Bee Fly | Insecta | Bombyliidae | P |
| Hemipenthes jaennickeana | Bee fly | Insecta | Bombyliidae | C |
| Hemipenthes morioides | American Morio Bee Fly | Insecta | Bombyliidae | C |
| Hemipenthes seminigra | Banded bee fly | Insecta | Bombyliidae | P |
| Hemipenthes sinuosa | Sinuous Bee Fly | Insecta | Bombyliidae | C |
| Poecilanthrax willistonii | Banded bee fly | Insecta | Bombyliidae | P |
| Poecilognathus sp. | Bee fly | Insecta | Bombyliidae | TBD |
| Systoechus sp. | Grasshopper Bee Fly, Woolly bee fly | Insecta | Bombyliidae | C |
| Thevenetimyia luctifera | Bee fly | Insecta | Bombyliidae | P |
| Villa harveyi | Banded bee fly | Insecta | Bombyliidae | P |
| Villa sp. | Banded bee fly | Insecta | Bombyliidae | P |
| Calliphora sp. | Blow fly | Insecta | Calliphoridae | P |
| Calliphora vicina | Blue Blow Fly | Insecta | Calliphoridae | C |
| Calliphora vomitoria | Orange-bearded Bluebottle Fly, Holarctic Blue Blowfly | Insecta | Calliphoridae | P |
| Cyanus elongata | Blow fly | Insecta | Calliphoridae | C |
| Cynomya cadaverina | Shiny Blue Bottle Fly | Insecta | Calliphoridae | P |
| Lucilia sericata | Common Green Bottle Fly | Insecta | Calliphoridae | P |
| Lucilia sp. | Green bottle fly, Greenbottle fly | Insecta | Calliphoridae | P |
| Phormia regina | Black Blow Fly | Insecta | Calliphoridae | P |
| Pollenia angustigena | Narrow-cheeked Clusterfly | Insecta | Calliphoridae | P |
| Pollenia labialis | Clusterfly | Insecta | Calliphoridae | P |
| Pollenia pediculata | Tufted Clusterfly, Tufted Cluster Fly | Insecta | Calliphoridae | C |
| Pollenia rudis | Common Clusterfly | Insecta | Calliphoridae | P |
| Pollenia vagabunda | Vagabond Clusterfly | Insecta | Calliphoridae | P |
| Protocalliphora sp. | Bird blow fly | Insecta | Calliphoridae | P |
| Pelomyiella sp. | Beach fly | Insecta | Canacidae | C |
| Synneuron decipiens | Canthyloscelid fly | Insecta | Canthyloscelidae | P |
| | Acalyptrate fly | Insecta | Carnidae | P |
| | Gall midge, wood midge | Insecta | Cecidoymiidae | C |
| Blaesodiplosis sp. | Gall midge | Insecta | Cecidoymiidae | C |
| Rabdophaga salicisbrassicoides | Willow Cabbage Gall Midge, Willow Rosette Gall Midge | Insecta | Cecidoymiidae | P |
| Rabdophaga strobiloides | Willow Pinecone Gall Midge | Insecta | Cecidoymiidae | P |
| | Biting midge, no-see-um | Insecta | Ceratopogonidae | P |
| Culicoides | Biting midge, no-see-um | Insecta | Ceratopogonidae | C |
| | Aphid fly | Insecta | Chamaemyiidae | P |
| Chaoborus sp. | Phantom midge | Insecta | Chaoboridae | P |
| | Non-biting midge | Insecta | Chironomidae | C |
| | Grass fly | Insecta | Chloropidae | P |
| Thaumatomyia sp. | Grass fly | Insecta | Chloropidae | P |
| | Golden fly | Insecta | Chyromidae | TBD |
| Clusia sp. | Druid fly | Insecta | Clusiidae | TBD |
| Clusiodes sp. | Druid fly | Insecta | Clusiidae | P |
| Dalmannia picta | Thick-headed fly | Insecta | Conopidae | TBD |
| Myopa clausa | Thick-headed fly | Insecta | Conopidae | C |
| Myopa sp. | Thick-headed fly | Insecta | Conopidae | P |
| Physocephala burgessi | Thick-headed fly | Insecta | Conopidae | P |
| Physocephala marginata | Thick-headed fly | Insecta | Conopidae | TBD |
| Physocephala texana | Thick-headed fly | Insecta | Conopidae | C |
| Physoconops obscuripennis | Thick-headed fly | Insecta | Conopidae | P |
| Thecophora sp. | Thick-headed fly | Insecta | Conopidae | C |
| Zodion fulvifrons | Thick-headed fly | Insecta | Conopidae | C |
| Aedes campestris | Mosquito | Insecta | Culicidae | TBD |
| Aedes canadensis | Woodland Pool Mosquito | Insecta | Culicidae | P |
| Aedes cataphylla | Mosquito | Insecta | Culicidae | P |
| Aedes cinereus | Mosquito | Insecta | Culicidae | P |
| Aedes communis | Mosquito | Insecta | Culicidae | P |
| Aedes dorsalis | Mosquito | Insecta | Culicidae | P |
| Aedes euedes | Mosquito | Insecta | Culicidae | P |
| Aedes excrucians | Woodland Mosquito | Insecta | Culicidae | P |
| Aedes fitchii | Mosquito | Insecta | Culicidae | P |
| Aedes flavescens | Mosquito | Insecta | Culicidae | TBD |
| Aedes hendersoni | Mosquito | Insecta | Culicidae | P |
| Aedes hexodontus | Mosquito | Insecta | Culicidae | TBD |
| Aedes implicatus | Mosquito | Insecta | Culicidae | P |
| Aedes increpitus | Mosquito | Insecta | Culicidae | P |
| Aedes intrudens | Mosquito | Insecta | Culicidae | P |
| Aedes melanimon | Mosquito | Insecta | Culicidae | TBD |
| Aedes mercurator | Mosquito | Insecta | Culicidae | TBD |
| Aedes nevadensis | Mosquito | Insecta | Culicidae | P |
| Aedes pionips | Mosquito | Insecta | Culicidae | TBD |
| Aedes provocans | Mosquito | Insecta | Culicidae | TBD |
| Aedes pullatus | Mosquito | Insecta | Culicidae | TBD |
| Aedes punctor | Mosquito | Insecta | Culicidae | P |
| Aedes schizopinax | Mosquito | Insecta | Culicidae | TBD |
| Aedes sierrensis | Western Treehole Mosquito | Insecta | Culicidae | P |
| Aedes spencerii | Mosquito | Insecta | Culicidae | P |
| Aedes sticticus | Mosquito | Insecta | Culicidae | P |
| Aedes vexans | Inland Floodwater Mosquito | Insecta | Culicidae | P |
| Anopheles earlei | Malaria mosquito | Insecta | Culicidae | P |
| Anopheles freeborni | Malaria mosquito | Insecta | Culicidae | P |
| Anopheles punctipennis | Woodland Malaria Mosquito | Insecta | Culicidae | P |
| Coquillettidia perturbans | Cattail Mosquito | Insecta | Culicidae | P |
| Culex pipiens | Common House Mosquito, Northern House Mosquito | Insecta | Culicidae | P |
| Culex tarsalis | Western Encephalitis Mosquito | Insecta | Culicidae | P |
| Culex territans | Culicine mosquito | Insecta | Culicidae | P |
| Culiseta alaskaensis | Culicine mosquito | Insecta | Culicidae | P |
| Culiseta impatiens | Culicine mosquito | Insecta | Culicidae | P |
| Culiseta incidens | Cold Weather Mosquito | Insecta | Culicidae | P |
| Culiseta inornata | Winter Mosquito | Insecta | Culicidae | P |
| Culiseta morsitans | Culicine mosquito | Insecta | Culicidae | TBD |
| | Acalyptrate fly | Insecta | Diastatidae | TBD |
| Dixa | Meniscus midge, Dixid midge | Insecta | Dixidae | P |
| Dixella | Meniscus midge, Dixid midge | Insecta | Dixidae | P |
| | Long-legged fly | Insecta | Dolichopodidae | C |
| Condylostylus occidentalis | Long-legged fly | Insecta | Dolichopodidae | C |
| Condylostylus patibulatus | Long-legged fly | Insecta | Dolichopodidae | P |
| Medetera sp. | Woodpecker fly | Insecta | Dolichopodidae | C |
| | Vinegar fly, fruit fly | Insecta | Drosophilidae | P |
| Drosophila buskii | Small fruit fly | Insecta | Drosophilidae | P |
| Drosophila funebris | Small fruit fly | Insecta | Drosophilidae | P |
| Drosophila hydei | Hydei Fruit Fly | Insecta | Drosophilidae | P |
| Drosophila melanogaster | Common Fruit Fly | Insecta | Drosophilidae | P |
| Drosophila pseudoobscura | Small fruit fly | Insecta | Drosophilidae | P |
| Drosophila sp. | Small fruit fly | Insecta | Drosophilidae | P |
| Drosophila suzukii | Spotted-winged Drosophila | Insecta | Drosophilidae | C |
| Scaptomyza sp. | Vinegar fly, fruit fly | Insecta | Drosophilidae | P |
| Dryomyza sp. | Dryomyzid fly | Insecta | Dryomyzidae | TBD |
| | Dance fly | Insecta | Empididae | C |
| | Shore fly | Insecta | Ephydridae | P |
| Cirrula hians | Mono Lake Alkali Fly | Insecta | Ephydridae | TBD |
| Ephydra sp. | Shore fly | Insecta | Ephydridae | P |
| Hydrellia sp. | Shore fly | Insecta | Ephydridae | P |
| Parydra sp. | Shore fly | Insecta | Ephydridae | P |
| Scatella sp. | Shore fly | Insecta | Ephydridae | P |
| Scatophila sp. | Shore fly | Insecta | Ephydridae | P |
| Fannia | Muscoid fly | Insecta | Fanniidae | C |
| | Heleomyzid fly | Insecta | Heleomyzidae | P |
| Suillia sp. | Heleomyzid fly | Insecta | Heleomyzidae | TBD |
| | Louise fly | Insecta | Hippoboscidae | P |
| Melophagus ovinus | Sheep Ked | Insecta | Hippoboscidae | P |
| Neolipoptena ferrisi | Louse fly | Insecta | Hippoboscidae | P |
| Platypalpus sp. | Hybotid dance fly | Insecta | Hybotidae | P |
| Tachydromia schwarzii | Hybotid dance fly | Insecta | Hybotidae | P |
| Tachypeza sp. | Hybotid dance fly | Insecta | Hybotidae | C |
| | Lauxaniid fly | Insecta | Lauxaniidae | P |
| Homoneura sp. | Lauxaniid fly | Insecta | Lauxaniidae | TBD |
| Lauxania sp. | Lauxaniid fly | Insecta | Lauxaniidae | TBD |
| Minettia sp. | Lauxaniid fly | Insecta | Lauxaniidae | P |
| Sapromyza sp. | Lauxaniid fly | Insecta | Lauxaniidae | P |
| Chionea albertensis | Wingless Limoniid crane fly, snow fly, snow crane fly | Insecta | Limoniidae | P |
| Chionea alexandriana | Wingless Limoniid crane fly, snow fly, snow crane fly | Insecta | Limoniidae | C |
| Dasiops sp. | Lance fly | Insecta | Lonchaeidae | P |
| Earomyia sp. | Lance fly | Insecta | Lonchaeidae | P |
| Lonchaea sp. | Lance fly | Insecta | Lonchaeidae | P |
| Lonchoptera sp. | Spear-winged fly | Insecta | Lonchopteridae | P |
| Compsobata mima | Stilt-legged fly | Insecta | Micropezidae | P |
| Compsobata sp. | Stilt-legged fly | Insecta | Micropezidae | P |
| Compsobata univitta | Stilt-legged fly | Insecta | Micropezidae | P |
| Micropeza lineata | Stilt-legged fly | Insecta | Micropezidae | P |
| | Freeloader fly | Insecta | Milichiidae | P |
| | Muscoid fly | Insecta | Muscidae | P |
| Coenosia sp. | Tiger fly | Insecta | Muscidae | C |
| Eudasyphora sp. | Muscoid fly | Insecta | Muscidae | P |
| Fannia sp. | Muscoid fly | Insecta | Muscidae | C |
| Haematobia irritans | Horn Fly | Insecta | Muscidae | P |
| Helina sp. | Muscoid fly | Insecta | Muscidae | C |
| Hydrotaea sp. | Muscoid fly | Insecta | Muscidae | P |
| Lispe sp. | Muscoid fly | Insecta | Muscidae | TBD |
| Mesembrina sp. | Muscoid fly | Insecta | Muscidae | C |
| Musca domestica | House Fly | Insecta | Muscidae | C |
| Musca sp. | Face Fly | Insecta | Muscidae | TBD |
| Muscina stabulans | False Stable Fly | Insecta | Muscidae | P |
| Neomyia cornicina | Muscoid fly | Insecta | Muscidae | C |
| Phaonia sp. | Muscoid fly | Insecta | Muscidae | P |
| Spilogona sp. | Muscoid fly | Insecta | Muscidae | P |
| Stomoxys calcitrans | Stable Fly | Insecta | Muscidae | P |
| | Fungus gnat | Insecta | Mycetophilidae | C |
| Nemomydas pantherinus | Western Mydas Fly | Insecta | Mydidae | TBD |
| Neorhynchocephalus sackenii | Tangle-veined fly, long-tongued fly | Insecta | Nemestrinidae | P |
| Basilia forcipata | Nycteribiid bat fly | Insecta | Nycteribiidae | TBD |
| Odinia sp. | Acalyptrate fly | Insecta | Odiniidae | P |
| Cephenemyia sp. | Bot fly | Insecta | Oestridae | P |
| Cuterebra sp. | Glire bot fly | Insecta | Oestridae | C |
| Gasterophilus sp. | Horse bot fly | Insecta | Oestridae | P |
| Hypoderma | Warble fly | Insecta | Oestridae | P |
| Oestrus ovis | Sheep Nostril Fly | Insecta | Oestridae | P |
| Geomyza sp. | Acalyptrate fly | Insecta | Opoymzidae | P |
| Palloptera sp. | Flutter fly | Insecta | Pallopteridae | P |
| | Pelecorhynchid snipe fly | Insecta | Pelecorhynchidae | TBD |
| Periscelis wheeleri | Acalyptrate fly | Insecta | Periscelidae | TBD |
| | Humpbacked fly | Insecta | Phoridae | P |
| Mycetaulus sp. | Cheese skipper, cheese skipper fly | Insecta | Piophilidae | P |
| Piophila casei | Cheese skipper | Insecta | Piophilidae | TBD |
| Prochyliza sp. | Waltzing fly | Insecta | Piophilidae | P |
| | Big-headed fly, big-eyed fly | Insecta | Pipunculidae | P |
| | Flat-footed fly | Insecta | Platypezidae | P |
| | Signal fly | Insecta | Platystomatidae | TBD |
| Chamaepsila rosae | Carrot Rust Fly, Carrot Fly | Insecta | Psilidae | TBD |
| Chyliza sp. | Rust fly | Insecta | Psilidae | P |
| Psila sp. | Rust fly | Insecta | Psilidae | TBD |
| | Moth fly, sand fly | Insecta | Psychodidae | C |
| Clogmia albipunctata | Bathroom Moth Midge | Insecta | Psychodidae | C |
| Psychoda sp. | Moth fly | Insecta | Psychodidae | P |
| | Phantom crane fly | Insecta | Ptychopteridae | P |
| Boreothrinax shewelli | Scarab pursuing fly | Insecta | Pyrgotidae | TBD |
| Chrysopilus sp. | Snipe fly | Insecta | Rhagionidae | P |
| Rhagio sp. | Snipe fly | Insecta | Rhagionidae | P |
| Symphoromyia sp. | Rocky Mountain bite fly | Insecta | Rhagionidae | P |
| | Flesh fly | Insecta | Sarcophagidae | P |
| Amobia oculata | Satellite fly | Insecta | Sarcophagidae | P |
| Blaesoxipha opifera | Grasshopper flesh fly | Insecta | Sarcophagidae | P |
| Blaesoxipha sp. | Grasshopper flesh fly | Insecta | Sarcophagidae | P |
| Metopia sp. | Satellite fly | Insecta | Sarcophagidae | P |
| Ravinia sp. | Flesh fly | Insecta | Sarcophagidae | P |
| Sarcophaga sp. | Flesh fly | Insecta | Sarcophagidae | C |
| | Dung fly | Insecta | Scathophagidae | P |
| Cordilura sp. | Dung fly | Insecta | Scathophagidae | P |
| Scathophaga sp. | Dung fly | Insecta | Scathophagidae | P |
| Scathophaga stercoraria | Yellow Dung Fly, Common Yellow Dung Fly, Golden Dung Fly | Insecta | Scathophagidae | P |
| | Minute black scavenger fly, black scavenger fly | Insecta | Scatopsidae | P |
| | Window fly | Insecta | Scenopinidae | P |
| | Dark-winged fungus gnats | Insecta | Sciaridae | C |
| Dictya sp. | Marsh fly | Insecta | Sciomyzidae | TBD |
| Pherbellia sp. | Marsh fly | Insecta | Sciomyzidae | TBD |
| Sepedon sp. | Snail-killing fly | Insecta | Sciomyzidae | P |
| Tetanocera sp. | Marsh fly | Insecta | Sciomyzidae | P |
| | Black scavenger fly | Insecta | Sepsidae | P |
| | Black fly | Insecta | Simuliidae | P |
| Helodon sp. | Black fly | Insecta | Simuliidae | C |
| Prosimulium sp. | Black fly | Insecta | Simuliidae | C |
| Simulium sp. | Black fly | Insecta | Simuliidae | C |
| Twinnia nova | Black fly | Insecta | Simuliidae | P |
| | Lesser dung fly | Insecta | Sphaeroceridae | P |
| Caloparyphus sp. | Soldier fly | Insecta | Stratiomyidae | TBD |
| Exaireta spinigera | Garden Soldier Fly | Insecta | Stratiomyidae | TBD |
| Gowdeyana punctifera | Soldier fly | Insecta | Stratiomyidae | TBD |
| Microchrysa polita | Soldier fly | Insecta | Stratiomyidae | P |
| Neopachygaster occidentalis | Soldier fly | Insecta | Stratiomyidae | TBD |
| Odontomyia sp. | Soldier fly | Insecta | Stratiomyidae | C |
| Sargus bipunctatus | Twin-spot Centurion Soldier Fly | Insecta | Stratiomyidae | C |
| Stratiomys griseata | Soldier fly | Insecta | Stratiomyidae | C |
| Stratiomys sp. | Soldier fly | Insecta | Stratiomyidae | P |
| Zabrachia sp. | Soldier fly | Insecta | Stratiomyidae | P |
| Trichobius corynorhini | Streblid bat fly | Insecta | Streblidae | TBD |
| Strongylophthalmyia angustipennis | Acalyptrate fly | Insecta | Strongylophthalmyiidae | TBD |
| Microdon tristis | Long-horned Ant Fly | Insecta | Syprphidae (Microdontinae) | TBD |
| Asemosyrphus mexicanus | Rat-tail maggot fly | Insecta | Syrphidae (Eristalinae) | C |
| Ceriana tridens | Western Wasp Fly | Insecta | Syrphidae (Eristalinae) | TBD |
| Chalcosyrphus sp. | Leafwalker | Insecta | Syrphidae (Eristalinae) | C |
| Eristalis anthoporina | Orange-spotted Drone Fly | Insecta | Syrphidae (Eristalinae) | C |
| Eristalis arbustorum | European Drone Fly | Insecta | Syrphidae (Eristalinae) | P |
| Eristalis flavipes | Orange-legged Drone Fly | Insecta | Syrphidae (Eristalinae) | P |
| Eristalis hirta | Black-footed Drone Fly | Insecta | Syrphidae (Eristalinae) | P |
| Eristalis nemorum | Orange-spined Drone Fly | Insecta | Syrphidae (Eristalinae) | TBD |
| Eristalis stipator | Yellow-shouldered Drone Fly | Insecta | Syrphidae (Eristalinae) | TBD |
| Eristalis tenax | Common Drone Fly | Insecta | Syrphidae (Eristalinae) | C |
| Hadromyia sp. | Quicksilvers | Insecta | Syrphidae (Eristalinae) | TBD |
| Merodon equestris | Narcissus Bulb Fly | Insecta | Syrphidae (Eristalinae) | P |
| Polydontomyia curvipes | Dimorphic Sickleleg | Insecta | Syrphidae (Eristalinae) | P |
| Sericomyia chalcopyga | Western Pond Fly | Insecta | Syrphidae (Eristalinae) | P |
| Sericomyia militaris | Narrow-banded Pond Fly | Insecta | Syrphidae (Eristalinae) | P |
| Spilomyia sp. | Hornet fly | Insecta | Syrphidae (Eristalinae) | TBD |
| Syritta pipiens | Thick-legged Hover Fly | Insecta | Syrphidae (Eristalinae) | C |
| Temnostoma sp. | Falsehorn fly | Insecta | Syrphidae (Eristalinae) | P |
| Tropidia sp. | Drone fly | Insecta | Syrphidae (Eristalinae) | TBD |
| Volucella bombylans | Bumble Bee Flower Bee | Insecta | Syrphidae (Eristalinae) | TBD |
| Baccha cognata | American Dainty | Insecta | Syrphidae (Syrphinae) | P |
| Chrysotoxum sp. | Meadow fly | Insecta | Syrphidae (Syrphinae) | C |
| Dasysyrphus creper | Arched Conifer Fly | Insecta | Syrphidae (Syrphinae) | P |
| Dasysyrphus intrudens (complex) | Confusing Conifer Fly | Insecta | Syrphidae (Syrphinae) | C |
| Dasysyrphus limatus | Narrow-banded Conifer Fly | Insecta | Syrphidae (Syrphinae) | P |
| Dasysyrphus occidualis | Western Conifer Fly | Insecta | Syrphidae (Syrphinae) | P |
| Dasysyrphus pauxillus | Montane Conifer Fly | Insecta | Syrphidae (Syrphinae) | TBD |
| Dasysyrphus venustus | Transverse Conifer Fly | Insecta | Syrphidae (Syrphinae) | P |
| Didea fuscipes | Undivided Lucent | Insecta | Syrphidae (Syrphinae) | P |
| Doros aequalis | Canadian Potter Fly | Insecta | Syrphidae (Syrphinae) | TBD |
| Epistrophe emarginata | Slender Smoothtail | Insecta | Syrphidae (Syrphinae) | TBD |
| Epistrophe grossulariae | Black-horned Smoothtail | Insecta | Syrphidae (Syrphinae) | P |
| Epistrophe nitidicollis | Straight-banded Smoothtail | Insecta | Syrphidae (Syrphinae) | P |
| Epistrophe xanthostoma | Emarginate Smoothtail | Insecta | Syrphidae (Syrphinae) | P |
| Eupeodes americanus | Long-tailed Aphideater | Insecta | Syrphidae (Syrphinae) | TBD |
| Eupeodes fumipennis | Western Aphideater | Insecta | Syrphidae (Syrphinae) | C |
| Eupeodes latifasciatus | Variable Aphideater | Insecta | Syrphidae (Syrphinae) | P |
| Eupeodes luniger | Black-tailed Aphideater | Insecta | Syrphidae (Syrphinae) | TBD |
| Eupeodes perplexus | Bare-winged Aphideater | Insecta | Syrphidae (Syrphinae) | P |
| Eupeodes pomus | Short-tailed Aphideater | Insecta | Syrphidae (Syrphinae) | P |
| Eupeodes snowi | Snow's Aphideater | Insecta | Syrphidae (Syrphinae) | P |
| Eupeodes talus | Yellow-tailed Aphideater | Insecta | Syrphidae (Syrphinae) | TBD |
| Eupeodes volucris | Large-tailed Aphideater | Insecta | Syrphidae (Syrphinae) | C |
| Hypocritanus lemur | American Thintail Fly | Insecta | Syrphidae (Syrphinae) | P |
| Lapposyrphus aberrantis | Western Loopwing Aphideater | Insecta | Syrphidae (Syrphinae) | P |
| Lapposyrphus lapponicus | Common Loopwing Aphideater | Insecta | Syrphidae (Syrphinae) | C |
| Leucozona americana | American Whitebelt | Insecta | Syrphidae (Syrphinae) | TBD |
| Leucozona velutina | Western Hoary | Insecta | Syrphidae (Syrphinae) | TBD |
| Megasyrphus laxus | Black-legged Gossamer | Insecta | Syrphidae (Syrphinae) | P |
| Melangyna coei | Coe's Halfband | Insecta | Syrphidae (Syrphinae) | P |
| Melangyna labiatarum | Bare-eyed Halfband | Insecta | Syrphidae (Syrphinae) | C |
| Melangyna lasiophthalma | Hairy-eyed Halfband | Insecta | Syrphidae (Syrphinae) | P |
| Melangyna umbellatarum | Bare-winged Halfband | Insecta | Syrphidae (Syrphinae) | C |
| Melanostoma mellinum | Variable Duskyface Fly | Insecta | Syrphidae (Syrphinae) | P |
| Meligramma triangulifera | Variable Roundtail | Insecta | Syrphidae (Syrphinae) | P |
| Meliscaeva cinctella | American Thintail Fly | Insecta | Syrphidae (Syrphinae) | P |
| Paragus angustifrons | Narrow-faced Grass Skimmer | Insecta | Syrphidae (Syrphinae) | P |
| Paragus haemorrhous | Black-backed Grass Skimmer | Insecta | Syrphidae (Syrphinae) | C |
| Paragus variabilis | Variable Grass Skimmer | Insecta | Syrphidae (Syrphinae) | P |
| Parasyrphus currani | Curran's Bristleside | Insecta | Syrphidae (Syrphinae) | P |
| Parasyrphus genualis | Common Bristleside | Insecta | Syrphidae (Syrphinae) | P |
| Parasyrphus insolitus | Broad-striped Bristleside | Insecta | Syrphidae (Syrphinae) | P |
| Parasyrphus relictus | Boreal Bristleside | Insecta | Syrphidae (Syrphinae) | P |
| Parasyrphus tarsatus | Holarctic Bristleside | Insecta | Syrphidae (Syrphinae) | P |
| Parasyrphus vockerothi | Bristleside | Insecta | Syrphidae (Syrphinae) | TBD |
| Platycheirus albimanus | Three-tufted Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus angustatus | Delicate Sedgesitter | Insecta | Syrphidae (Syrphinae) | C |
| Platycheirus coerulescens | Hooked Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus concinnus | Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus confusus | Confusing Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus hispidipes | Terrace Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus hyperboreus | Pearly Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus immarginatus | Comb-legged Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus naso | Terrace Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus nearcticus | Nearctic Broadhand Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus nodosus | Twospear Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus obscurus | Eastern Forest Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus octavus | Montane Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus peltatoides | Keeled Sedgesitter | Insecta | Syrphidae (Syrphinae) | C |
| Platycheirus quadratus | Meadow Sedgesitter | Insecta | Syrphidae (Syrphinae) | C |
| Platycheirus rufimaculatus | Sedgesitter | Insecta | Syrphidae (Syrphinae) | C |
| Platycheirus scambus | Blackspine Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus scutatus | Many-tufted Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus setipes | Black Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus sp. | Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Platycheirus stegnus | Greater Punctate Sedgesitter | Insecta | Syrphidae (Syrphinae) | C |
| Pseudoscaeva diversifasciata | Silver-banded Hover Fly | Insecta | Syrphidae (Syrphinae) | TBD |
| Pyrophaena granditarsis | Hornhand Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Pyrophaena rosarum | Fourspot Sedgesitter | Insecta | Syrphidae (Syrphinae) | P |
| Scaeva affinis | White-bowed Smoothwing | Insecta | Syrphidae (Syrphinae) | C |
| Sphaerophoria abbreviata | Variable Globetail | Insecta | Syrphidae (Syrphinae) | C |
| Sphaerophoria asymmetrica | Asymmetric Globetail | Insecta | Syrphidae (Syrphinae) | P |
| Sphaerophoria brevipilosa | Broad-striped Globetail | Insecta | Syrphidae (Syrphinae) | P |
| Sphaerophoria contigua | Tufted Globetail | Insecta | Syrphidae (Syrphinae) | P |
| Sphaerophoria cranbrookensis | Greater Globetail | Insecta | Syrphidae (Syrphinae) | TBD |
| Sphaerophoria novaeangliae | Black-striped Globetail | Insecta | Syrphidae (Syrphinae) | P |
| Sphaerophoria philanthus | Black-footed Globetail | Insecta | Syrphidae (Syrphinae) | C |
| Sphaerophoria pyrrhina | Violaceous Globetail | Insecta | Syrphidae (Syrphinae) | C |
| Sphaerophoria sulphuripes | Forked Globetail | Insecta | Syrphidae (Syrphinae) | P |
| Syrphus attenuatus | Yellow-margined Flower Fly | Insecta | Syrphidae (Syrphinae) | TBD |
| Syrphus intricatus | Yellow-faced Flower Fly | Insecta | Syrphidae (Syrphinae) | C |
| Syrphus opinator | Black-margined Flower Fly | Insecta | Syrphidae (Syrphinae) | C |
| Syrphus ribesii | Common Flower Fly | Insecta | Syrphidae (Syrphinae) | C |
| Syrphus torvus | Hairy-eyed Flower Fly | Insecta | Syrphidae (Syrphinae) | C |
| Syrphus vitripennis | Black-legged Flower Fly | Insecta | Syrphidae (Syrphinae) | P |
| Toxomerus marginatus | Margined Calligrapher | Insecta | Syrphidae (Syrphinae) | C |
| Toxomerus occidentalis | Western Calligrapher | Insecta | Syrphidae (Syrphinae) | C |
| Atylotus calcar | Horse fly | Insecta | Tabanidae | P |
| Atylotus tinguareus | Horse fly | Insecta | Tabanidae | TBD |
| Chysops aestuans | Deer fly | Insecta | Tabanidae | P |
| Chysops asbestos | Shining Deer Fly | Insecta | Tabanidae | P |
| Chysops ater | Dark Deer Fly | Insecta | Tabanidae | P |
| Chysops discalis | Deer fly | Insecta | Tabanidae | P |
| Chysops excitans | Deer fly | Insecta | Tabanidae | P |
| Chysops furcatus | Deer fly | Insecta | Tabanidae | P |
| Chysops mitis | Deer fly | Insecta | Tabanidae | P |
| Chysops noctifer | Deer fly | Insecta | Tabanidae | P |
| Chysops sp. | Deer fly | Insecta | Tabanidae | TBD |
| Haematopota americana | Clegs | Insecta | Tabanidae | P |
| Hybomitra affinis | Horse fly | Insecta | Tabanidae | P |
| Hybomitra captonis | Horse fly | Insecta | Tabanidae | P |
| Hybomitra epistates | Horse fly | Insecta | Tabanidae | P |
| Hybomitra frontalis | Horse fly | Insecta | Tabanidae | P |
| Hybomitra fulvilateralis | Horse fly | Insecta | Tabanidae | P |
| Hybomitra illota | Horse fly | Insecta | Tabanidae | P |
| Hybomitra itasca | Horse fly | Insecta | Tabanidae | TBD |
| Hybomitra lurida | Broad-headed Horse Fly | Insecta | Tabanidae | P |
| Hybomitra melanorhina | Horse fly | Insecta | Tabanidae | TBD |
| Hybomitra osburni | Horse fly | Insecta | Tabanidae | P |
| Hybomitra pechumani | Horse fly | Insecta | Tabanidae | TBD |
| Hybomitra procyon | Horse fly | Insecta | Tabanidae | P |
| Hybomitra rupestris | Horse fly | Insecta | Tabanidae | C |
| Hybomitra sonomensis | Horse fly | Insecta | Tabanidae | P |
| Hybomitra sp. | Horse fly | Insecta | Tabanidae | P |
| Hybomitra tetrica | Horse fly | Insecta | Tabanidae | P |
| Hybomitra trepida | Horse fly | Insecta | Tabanidae | P |
| Hybomitra zonalis | Horse fly | Insecta | Tabanidae | P |
| Silvius gigantulus | Golden Gadfly, Golden Deer Fly | Insecta | Tabanidae | C |
| Stonemyia californica | Deer fly | Insecta | Tabanidae | C |
| Tabanus aegrotus | Horse fly | Insecta | Tabanidae | P |
| Tabanus kesseli | Horse fly | Insecta | Tabanidae | P |
| Tabanus punctifer | Western Black Horse Fly | Insecta | Tabanidae | C |
| Tabanus sequax | Horse fly | Insecta | Tabanidae | P |
| Tabanus similis | Horse fly | Insecta | Tabanidae | P |
| Tabanus sp. | Horse fly | Insecta | Tabanidae | TBD |
| Tabanus stonei | Horse fly | Insecta | Tabanidae | P |
| Compsilura concinnata | Tachinid fly | Insecta | Tachinidae | TBD |
| Cylindromyia sp. | Tachinid fly | Insecta | Tachinidae | C |
| Epalpus signifer | Early Tachinid Fly | Insecta | Tachinidae | C |
| Gonia sp. | Tachinid fly | Insecta | Tachinidae | P |
| Gymnocheta sp. | Tachinid fly | Insecta | Tachinidae | TBD |
| Gymnosoma sp. | Tachinid fly | Insecta | Tachinidae | C |
| Hystricia abrupta | Tomato Bristle Fly | Insecta | Tachinidae | P |
| Panzeria sp. | Tachinid fly | Insecta | Tachinidae | P |
| Peleteria sp. | Tachinid fly | Insecta | Tachinidae | C |
| Siphona sp. | Tachinid fly | Insecta | Tachinidae | P |
| Tachina sp. | Tachinid fly | Insecta | Tachinidae | P |
| Winthemia sp. | Tachinid fly | Insecta | Tachinidae | P |
| Xanthoepalpus bicolor | Tachinid fly | Insecta | Tachinidae | TBD |
| Tanypeza longimana | Stretched-foot fly | Insecta | Tanypezidae | TBD |
| Campiglossa variabilis | Fruit fly | Insecta | Tephritidae | P |
| Eurosta solidaginis | Goldenrod Gall Fly | Insecta | Tephritidae | TBD |
| Eutreta diana | Fruit fly | Insecta | Tephritidae | P |
| Eutreta hespera | Fruit fly | Insecta | Tephritidae | P |
| Rhagoletis indifferens | Western Cherry Fruit Fly | Insecta | Tephritidae | P |
| Rhagoletis pomonella | Apple Maggot | Insecta | Tephritidae | E |
| Rhagoletis sp. | Fruit fly | Insecta | Tephritidae | P |
| Tephritis sp. | Fruit fly | Insecta | Tephritidae | TBD |
| Terellia occidentalis | Fruit fly | Insecta | Tephritidae | P |
| Trupanea californica | Fruit fly | Insecta | Tephritidae | P |
| Urophora affinis | Knapweed Gall Fly | Insecta | Tephritidae | P |
| Urophora quadrifasciata | Four-barred Knapweed Gall Fly | Insecta | Tephritidae | P |
| Urophora stylata | Bull Thistle Gall Fly | Insecta | Tephritidae | C |
| | Solitary midge | Insecta | Thaumaleidae | P |
| | Stiletto fly | Insecta | Therevidae | P |
| Holorusia hespera | Giant Western Crane Fly | Insecta | Tipulidae | P |
| Nephrotoma sp. | Tiger crane fly | Insecta | Tipulidae | P |
| Tipula californica | California Tipula | Insecta | Tipulidae | P |
| Tipula paludosa | European Crane Fly | Insecta | Tipulidae | TBD |
| Tipula pubera | Crane fly | Insecta | Tipulidae | P |
| Ceroxys latiusculus | Narrow-banded Picture-winged Fly | Insecta | Ulidiidae | C |
| Chaetopsis sp. | Banded-wing fly | Insecta | Ulidiidae | P |
| Melieria sp. | Picture-winged fly | Insecta | Ulidiidae | TBD |
| Physiphora alceae | Picture-winged fly | Insecta | Ulidiidae | P |
| Pseudotephritis sp. | Picture-winged fly | Insecta | Ulidiidae | TBD |
| Xylomya parens | Wood soldier fly | Insecta | Xylomyidae | C |
| | Awl fly, awl-fly | Insecta | Xylophagidae | P |