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)
Northern House Mosquito
Culex pipiens
Northern Spotwing
Eucyrtopogon diversipilosis
Northwestern Prospector
Ablautus coquilletti
Nostima quinquenotata
Nostima quinquenotata
Nothomyia calopus
Nothomyia calopus
Notiphila pulchra
Notiphila pulchra
Notiphila scalaris
Notiphila scalaris
Notogramma cimiciforme
Notogramma cimiciforme
Nuntianus cubanus
Nuntianus cubanus
Nyia cerberus
Nyia cerberus
Nyia gazophylax
Nyia gazophylax
Ocellate Gall Midge
Acericecis ocellaris
Ochlerotatus abserratus
Ochlerotatus abserratus
Ochlerotatus atlanticus
Ochlerotatus atlanticus
Ochlerotatus diantaeus
Ochlerotatus diantaeus
Ochlerotatus dorsalis
Ochlerotatus dorsalis
Ochlerotatus fulvus
Ochlerotatus fulvus
Ochlerotatus grossbecki
Ochlerotatus grossbecki
Ochlerotatus implicatus
Ochlerotatus implicatus
Ochlerotatus intrudens
Ochlerotatus intrudens
Ochlerotatus nigromaculis
Ochlerotatus nigromaculis
Ochlerotatus pullatus
Ochlerotatus pullatus
Ochlerotatus punctor
Ochlerotatus punctor
Ochlerotatus scapularis
Ochlerotatus scapularis
Ochlerotatus sticticus
Ochlerotatus sticticus
Ochlerotatus thelcter
Ochlerotatus thelcter
Ochlerotatus tormentor
Ochlerotatus tormentor
Ochre-faced Dunerobber
Laphystia ochreifrons
Ochthera anatolikos
Ochthera anatolikos
Ochthera lauta
Ochthera lauta
Ochthera mantis
Ochthera mantis
Ochthera tuberculata
Ochthera tuberculata
Ocnaea boharti
Ocnaea boharti
Ocnaea helluo 0
Ocnaea helluo
Ocnaea sequoia
Ocnaea sequoia
Ocydromia glabricula
Ocydromia glabricula
Ocyptamus antiphates
Ocyptamus antiphates
Ocyptamus gastrostactus
Ocyptamus gastrostactus
Odinia conspicua
Odinia conspicua
Odontomera ferruginea
Odontomera ferruginea
Odontomera limbata
Odontomera limbata
Odontomyia aldrichi
Odontomyia aldrichi
Odontomyia cincta
Odontomyia cincta
Odontomyia hoodiana
Odontomyia hoodiana
Odontomyia interrupta
Odontomyia interrupta
Odontomyia microstoma
Odontomyia microstoma
Odontomyia pilosa
Odontomyia pilosa
Odontomyia profuscata
Odontomyia profuscata
Odontomyia pubescens
Odontomyia pubescens
Odontomyia rufipes
Odontomyia rufipes
Odontomyia tumida
Odontomyia tumida
Odontomyia virgo group
Odontomyia virgo
Oecothea specus
Oecothea specus
Oedalea ohioensis
Oedalea ohioensis
Oedicarena latifrons
Oedicarena latifrons
Oedicarena persuasa
Oedicarena persuasa
Oedopa capito
Oedopa capito
Oestrophasia calva
Oestrophasia calva
Oestrophasia clausa
Oestrophasia clausa
Oestrophasia signifera
Oestrophasia signifera
Ogcodes borealis
Ogcodes borealis
Ogcodes canadensis
Ogcodes canadensis
Ogcodes eugonatus
Ogcodes eugonatus
Ogcodes pallidipennis
Ogcodes pallidipennis
Ogcodes rufoabdominalis
Ogcodes rufoabdominalis
Ogcodocera analis
Ogcodocera analis
Ogcodocera leucoprocta
Ogcodocera leucoprocta
Oidematops ferrugineus
Oidematops ferrugineus
Okanagan Hammertail
Efferia okanagana
Okanagan Spotwing
Comantella pacifica
Oklahoma Twigsitter
Heteropogon currani
Olcella parva
Olcella parva
Olcella trigramma
Olcella trigramma
Olive Fruit Fly
Bactrocera oleae
Olpodiplosis helianthi
Olpodiplosis helianthi
Omisus pica
Omisus pica
Ommatius baboquivari
Ommatius baboquivari
Ommatius bromleyi
Ommatius bromleyi
Ommatius floridensis
Ommatius floridensis
Ommatius gemma
Ommatius gemma
Ommatius parvulus
Ommatius parvulus
Ommatius pretiosus
Ommatius pretiosus
Ommatius tibialis
Ommatius tibialis
Ommatius wilcoxi
Ommatius wilcoxi
Omninablautus arenosus
Omninablautus arenosus
Omomyia hirsuta
Omomyia hirsuta
Omomyia regularis
Omomyia regularis
Oncodometopus umbrosus
Oncodometopus umbrosus
Opacifrons maculifrons
Opacifrons maculifrons
Opetiophora straminea
Opetiophora straminea
Ophiomyia abutilivora
Ophiomyia abutilivora
Ophiomyia antennariae
Ophiomyia antennariae
Ophiomyia astericosta
Ophiomyia astericosta
Ophiomyia atriplicis
Ophiomyia atriplicis
Ophiomyia beckeri
Ophiomyia beckeri
Ophiomyia camarae
Ophiomyia camarae
Ophiomyia carolinensis
Ophiomyia carolinensis
Ophiomyia chondrillae
Ophiomyia chondrillae
Ophiomyia chromolaenae
Ophiomyia chromolaenae
Ophiomyia coniceps
Ophiomyia coniceps