Flies
Order Diptera
The Flies (Order Diptera) includes 6,350 species across 141 families and 1,800 genera in our directory.
About Flies
Diptera includes over 150,000 described species of flies, mosquitoes, and midges. Mosquitoes are the deadliest animal on Earth (CDC). Malaria alone causes ~249 million cases and over 608,000 deaths annually, mostly children under 5 (WHO). Vector-borne diseases account for over 17% of all infectious diseases, causing 700,000+ deaths per year.
Economic Impact
In the U.S., vector-borne disease cases tripled between 2004-2016, with over 640,000 cases reported in that period (CDC). Tickborne diseases doubled from 22,000 to 48,000 annual reports. Globally, mosquito-borne diseases cost billions in healthcare and lost productivity.
Ecological Role
Despite their disease impact, flies are critical decomposers and pollinators. Hoverflies alone pollinate hundreds of crop and wildflower species. Flies are also the primary food source for many birds, bats, and fish. Forensic entomology relies heavily on fly species for crime scene analysis.
Families in Diptera (141)
Species in Diptera (6,350)
Ophiomyia erigeronis
Ophiomyia erigeronis
Ophiomyia euthamiae
Ophiomyia euthamiae
Ophiomyia galiodes
Ophiomyia galiodes
Ophiomyia labiatarum
Ophiomyia labiatarum
Ophiomyia lactucae
Ophiomyia lactucae
Ophiomyia mimuli
Ophiomyia mimuli
Ophiomyia nabali
Ophiomyia nabali
Ophiomyia osmorhizae
Ophiomyia osmorhizae
Ophiomyia parda
Ophiomyia parda
Ophiomyia pulicaria
Ophiomyia pulicaria
Ophiomyia rugula
Ophiomyia rugula
Ophiomyia texana
Ophiomyia texana
Ophiomyia tiliae
Ophiomyia tiliae
Ophiomyia vockerothi
Ophiomyia vockerothi
Opomydas townsendi
Opomydas townsendi
Opsodexia bicolor
Opsodexia bicolor
Orange-bellied Laphria
Laphria ventralis
Orange-legged Drone Fly
Eristalis flavipes
Orange-patched Laphria
Laphria gilva
Orange-tailed Laphria
Laphria janus
Orbellia petersoni
Orbellia petersoni
Orfelia fultoni
Orfelia fultoni
Oriental Fruit Fly
Bactrocera dorsalis
Orimarga mirabilis
Orimarga mirabilis
Ormia punctata
Ormia punctata
Ormosia affinis
Ormosia affinis
Ormosia pygmaea
Ormosia pygmaea
Ormosia romanovichiana
Ormosia romanovichiana
Ornate Snipe Fly
Chrysopilus ornatus
Ornithoica vicina
Ornithoica vicina
Ornithomya anchineuria
Ornithomya anchineuria
Orphnabaccha coerulea
Orphnabaccha coerulea
Orphnabaccha jactator
Orphnabaccha jactator
Orthogonis stygia
Orthogonis stygia
Oscinisoma alienum
Oscinisoma alienum
Ospriocerus aeacidinus
Ospriocerus aeacidinus
Ospriocerus aeacus
Ospriocerus aeacus
Ospriocerus arizonensis
Ospriocerus arizonensis
Ospriocerus brevis
Ospriocerus brevis
Ospriocerus latipennis
Ospriocerus latipennis
Ospriocerus longulus
Ospriocerus longulus
Ospriocerus minos
Ospriocerus minos
Ospriocerus tenebrosus
Ospriocerus tenebrosus
Ospriocerus tequilae
Ospriocerus tequilae
Ospriocerus vallensis
Ospriocerus vallensis
Ostracophyto flavicaudalis
Ostracophyto flavicaudalis
Otero Bandit
Cophura caca
Otites bimaculata
Otites bimaculata
Otites michiganus
Otites michiganus
Otites pyrrhocephala
Otites pyrrhocephala
Otites stigma
Otites stigma
Outhouse Fly
Sylvicola notatus
Oxycera albovittata
Oxycera albovittata
Oxycera picta 0
Oxycera picta
Oxycera variegata
Oxycera variegata
Oxyna palpalis
Oxyna palpalis
Oxyna utahensis
Oxyna utahensis
Ozark Sandpirate
Lasiopogon oklahomensis
Ozirhincus millefolii
Ozirhincus millefolii
Ozodiceromyia argentata
Ozodiceromyia argentata
Ozodiceromyia flavipennis
Ozodiceromyia flavipennis
Ozodiceromyia nanella
Ozodiceromyia nanella
Ozodiceromyia nigrimana
Ozodiceromyia nigrimana
Ozodiceromyia notata
Ozodiceromyia notata
Ozodiceromyia signatipennis
Ozodiceromyia signatipennis
Pachyceramyia robusta
Pachyceramyia robusta
Pachygaster montana
Pachygaster montana
Pachygaster pulchra
Pachygaster pulchra
Pacific Laphria
Laphria sackeni
Pacific Longhorn Robber
Eudioctria media
Painter Bandit
Cophura painteri
Palloptera claripennis
Palloptera claripennis
Palloptera subusta
Palloptera subusta
Palpada agrorum
Palpada agrorum
Palpada albifrons
Palpada albifrons
Palpada alhambra
Palpada alhambra
Palpada mexicana
Palpada mexicana
Palpada pusilla
Palpada pusilla
Palpada texana
Palpada texana
Palpomyia lineata
Palpomyia lineata
Palpomyia novitibialis
Palpomyia novitibialis
Palpomyia plebeiella
Palpomyia plebeiella
Palpomyia rufa
Palpomyia rufa
Pandivirilia conspicua
Pandivirilia conspicua
Pantarbes megistus
Pantarbes megistus
Pantarbes willistoni
Pantarbes willistoni
Panzeria ampelus
Panzeria ampelus
Panzeria arcuata
Panzeria arcuata
Panzeria manitoba
Panzeria manitoba
Paracantha culta
Paracantha culta
Paracantha cultaris
Paracantha cultaris
Paracantha gentilis
Paracantha gentilis
Paracladura trichoptera
Paracladura trichoptera
Paracoenia bisetosa
Paracoenia bisetosa
Paracoenia fumosalis
Paracoenia fumosalis
Paracraspedothrix angulicornis
Paracraspedothrix angulicornis
Paradidyma apicalis
Paradidyma apicalis
Paradidyma petiolata
Paradidyma petiolata
Paradiplocampta tabeti
Paradiplocampta tabeti
Paralimna punctipennis
Paralimna punctipennis