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Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Cladus: Metapterygota
Infraclassis: Neoptera
Cladus: Eumetabola
Cladus: Endopterygota
Superordo: Panorpida
Cladus: Antliophora
Ordo: Diptera
Subordo: Brachycera
Infraordo: Muscomorpha
Sectio: Aschiza
Superfamilia: Syrphoidea

Familia: Syrphidae
Subfamiliae (3): Eristalinae - Microdontinae - Syrphinae
Overview of genera (203)

Afromicrodon – Afrosyrphus – Agnisyrphus – Alipumilio – Allobaccha – Allograpta – Aneriophora – Antillus – Anu – Argentinomyia – Aristosyrphus – Asarkina – Asiodidea – Austalis – Austroascia – Austrocheilosia – Austrophilus – Axona – Azpeytia – Baccha – Betasyrphus – Blera – Brachyopa – Brachypalpus – Cacoceria – Calcaretropidia – Caliprobola – Callicera – Cepa – Ceriana – Ceriomicrodon – Chalcosyrphus – Chamaesphegina – Chasmomma – Cheilosia – Chromocheilosia – Chrysogaster – Chrysosyrphus – Chrysotoxum – Citrogramma – Claraplumula – Copestylum – Criorhina – Cynorhinella – Cyphipelta – Dasysyrphus – Deineches – Didea – Dideoides – Dideomima – Dideopsis – Digulia – Dissoptera – Dolichogyna – Doros – Endoiasimyia – Eosphaerophoria – Epistrophe – Episyrphus – Eriozona – Eristalinus – Eristalis – Eumerus – Eupeodes – Exallandra – Fazia – Ferdinandea – Flukea – Furcantenna – Giluwea – Graptomyza – Habromyia – Hadromyia – Helophilus – Hemilampra – Hemixylota – Heringia – Hiatomyia – Indascia – Ischyroptera – Ischyrosyrphus – Keda – Kertesziomyia – Kerteszomyia – Korinchia – Lamellidorsum – Lejogaster – Lejops – Lejota – Lepidomyia – Leucopodella – Leucozona – Liochrysogaster – Lycastrirhyncha – Lycastris – Macrometopia – Macropelecocera – Macrozelima – Mallota – Malometasternum – Masarygus – Matsumyia – Melangyna – Melanostoma – Meliscaeva – Merapioidus – Merodon – Meromacroides – Meromacrus – Meropidia – Mesembrius – Microdon – Milesia – Mixogaster – Myolepta – Nausigaster – Neoascia – Neoplesia – Nepenthosyrphus – Nothomicrodon – Notiocheilosia – Notosyrphus – Ocyptamus – Odyneromyia – Ohmyia – Ornidia – Orthonevra – Orthoprosopa – Palpada – Palumbia – Paragodon – Paragus – Paramesembrius – Paramicrodon – Paramixogaster – Pararctophila – Parasyrphus – Parhelophilus – Pelecocera – Pelloloma – Philippimyia – Phytomia – Pia – Pipiza – Pipizella – Platycheirus – Platychirus – Pocota – Portevinia – Primocerioides – Psarochilosia – Psarus – Pseudodoros – Pseudovolucella – Psilota – Pterallastes – Pyritis – Quichuana – Rhingia – Rhinobaccha – Rhinoprosopa – Rhopalosyrphus – Rohdendorfia – Salpingogaster – Scaeva – Schizoceratomyia – Senaspis – Senogaster – Sericomyia – Simoides – Simosyrphus – Solenaspis – Somula – Spazigaster – Sphaerophoria – Sphecomyia – Sphegina – Spheginobaccha – Sphiximorpha – Spilomyia – Sterphus – Stilbosoma – Surimyia – Syritta – Syrittosyrphus – Syrphocheilosia – Syrphus – Taeniochilosia – Takaomyia – Talahua – Temnostoma – Teuchocnemis – Tiquicia – Toxomerus – Trichopsomyia – Triglyphus – Tropidia – Tuberculanostoma – Valdiviomyia – Volucella – Xanthandrus – Xanthogramma – Xylota

[source: Catalogue of Life: 2012 Annual Checklist, minus (1) Ischiodon

Add (4): Afrostoma – Pelecinobaccha – Relictanum – Spazigasteroides

Syrphidae Latreille, 1802

Vernacular names
беларуская: Журчалкі
català: Sírfids
dansk: Svirreflue
Deutsch: Schwebfliegen
English: Hoverfly
español: Sírfidos
suomi: Kukkakärpäset
français: Syrphes ou syrphides
日本語: ハナアブ科
한국어: 꽃등에과
lietuvių: Žiedmusės
македонски: Лебдечки муви
Nederlands: Zweefvliegen (dieren)
norsk: Blomsterfluer
polski: Bzygowate
português: Mosca das flores
русский: Журчалки
svenska: Blomflugor
中文: 食蚜蠅科

Latreille, P.A. 1802. Histoire naturelle, générale et particulière des crustacés et des insectes. Ouvrage faisant suite à l’histoire naturelle générale et particulière, composée par Leclerc de Buffon, et rédigée par C.S. Sonnini, membre de plusieurs sociétés savantes. Familles naturelles des genres. Tome troisième. F. Dufart, Paris, xii + pp. 13–467 + [1 (errata)]. BHL Reference page.
Hauser, M. & Hippa, H. 2015: A remarkable new species of Chalcosyrphus Curran from the Oriental Region (Diptera: Syrphidae). Zootaxa 3986(1): 144–150. DOI: 10.11646/zootaxa.3986.1.9. Preview (PDF) Reference page.
Hippa, H., Steenis, J.V. & Mutin, V.A. 2015: The genus Sphegina Meigen (Diptera, Syrphidae) in a biodiversity hotspot: the thirty-six sympatric species in Kambaiti, Myanmar. Zootaxa 3954(1): 1–67. DOI: 10.11646/zootaxa.3954.1.1. Preview (PDF) ISBN 978-1-77557-689-1 (paperback) ISBN 978-1-77557-690-7 (Online edition) Reference page.
Jordaens, K., Goergen, G., Skevington, J.H., Kelso, S. & de Meyer, M. 2021. Revision of the Afrotropical species of the hover fly genus Mesembrius Rondani (Diptera, Syrphidae) using morphological and molecular data. ZooKeys 1046: 1–141. DOI: 10.3897/zookeys.1046.57052 Open access Reference page.
Reemer, M., 2010: A second survey of Surinam Syrphidae (Diptera): introduction and Syrphinae. Tijdschrift voor Entomologie 153 (2): 163–196.
Steenis, van J. & H. Hippa, 2012: Revision and phylogeny of the Oriental hoverfly genus Korinchia Edwards (Diptera: Syrphidae). Tijdschrift voor Entomologie 155: 209–268.
Miranda, G.F.G. 2017. Revision of the Hybobathus arx and Pelecinobaccha summa species groups (Diptera: Syrphidae). Zootaxa 4338(1): 1–43. DOI: 10.11646/zootaxa.4338.1.1. Reference page.
Montoya, A.L. & Wolff, M. 2020. Description of six new large species of Argentinomyia Lynch-Arribálzaga, 1891 and redescription of Talahua fervida (Fluke, 1945) (Diptera, Syrphidae, Syrphinae). ZooKeys, 929: 19–51. DOI: 10.3897/zookeys.929.37666 Open access Reference page.
Skevington, J., Young, A., Locke, M. & Moran, K. 2019. New Syrphidae (Diptera) of North-eastern North America. Biodiversity Data Journal, 7: e. DOI: 10.3897/BDJ.7.e36673 Reference page.
Thompson, F.C. 2012: Fabulous flower flies for famous fly fanatics (Diptera: Syrphidae). A tribute to the dipterists of the Canadian National Collection. Canadian entomologist 144(1): 1-16. DOI: 10.4039/tce.2012.4 Reference page.

Additional references

Marín-Armijos, D., Quezada-Ríos, N., Soto-Armijos, C. & Mengual, X. 2017. Checklist of the flower flies of Ecuador (Diptera, Syrphidae). ZooKeys 691: 163—199. DOI: 10.3897/zookeys.691.13328. Reference page.
Mengual, X., Bot, S., Chkhartishvili, T., Reimann, A., Thormann, J. & von der Mark, L. 2020. Checklist of hover flies (Diptera, Syrphidae) of the Republic of Georgia. ZooKeys, 916: 1–123. DOI: 10.3897/zookeys.916.47824 Open access Reference page.
Montoya, A.L. 2016. FAMILY SYRPHIDAE. In Wolff, M.I., Nihei, S.S. & Carvalho, C.J.B. de (eds.), Catalogue of Diptera of Colombia. Zootaxa 4122(1): 457–537. DOI: 10.11646/zootaxa.4122.1.39. Reference page.
Ricarte, A. & Marcos-García, M.A. 2017. A checklist of the Syrphidae (Diptera) of Spain, Andorra and Gibraltar. Zootaxa 4216(5): 401–440. DOI: 10.11646/zootaxa.4216.5.1. Reference page.
Sahib, S., Driauach, O. & Belqat, B. 2020. New data on the hoverflies of Morocco (Diptera, Syrphidae) with faunistic and bibliographical inventories. ZooKeys, 971: 59–103. DOI: 10.3897/zookeys.971.49416 Open access Reference page.


BHL bibliography
Catalogue of Life: 2020 Annual Checklist
Syrphidae – Taxon details on Encyclopedia of Life (EOL).
Global Biodiversity Information Facility. 2019. GBIF Backbone Taxonomy. Checklist dataset. Taxon: Syrphidae.
Tree of life
The world of Syrphidae

Hover flies, also called flower flies or syrphid flies, make up the insect family Syrphidae. As their common name suggests, they are often seen hovering or nectaring at flowers; the adults of many species feed mainly on nectar and pollen, while the larvae (maggots) eat a wide range of foods. In some species, the larvae are saprotrophs, eating decaying plant and animal matter in the soil or in ponds and streams. In other species, the larvae are insectivores and prey on aphids, thrips, and other plant-sucking insects.

Insects such as aphids are considered a crop pest, and therefore the aphid-eating larvae of some hover flies serve as an economically (as well as ecologically) important predator and even potential agents for use in biological control, while the adults may be pollinators.

About 6,000 species in 200 genera have been described. Hover flies are common throughout the world and can be found on all continents except Antarctica. Hover flies are harmless to most mammals, though many species are mimics of stinging wasps and bees, a mimicry which may serve to ward off predators.


The size of hover flies varies depending on the species.[1] Some, such as members of the genus Baccha, are small, elongated, and slender, while others, such as members of Criorhina, are large, hairy, and yellow and black. As members of the Diptera, all hover flies have a single functional pair of wings (the hind wings are reduced to balancing organs).[2] Many species are brightly colored, with spots, stripes, and bands of yellow or brown covering their bodies.[2] Due to this coloring, they are often mistaken for wasps or bees; they exhibit Batesian mimicry. Despite this, hover flies are harmless to humans.[1] Drone flies, E. tenax, are an example of a species of hover fly who exhibit Batesian mimicry.

With a few exceptions,[3] hover flies are distinguished from other flies by having a spurious vein, located parallel to their fourth longitudinal wing vein.[1] Adults feed mainly on nectar and pollen.[2] Many species also hover around flowers, lending to their common name.[1]

Bee flies of the family Bombyliidae often mimic Hymenoptera and hover around flowers, as well, rendering some bombyliid species hard to tell apart from Syrphidae at first glance. Hover flies can, nevertheless, be distinguished in the field by anatomical features such as:

The legs and mouthparts of hover flies are usually not particularly long and thin (some bombyliids have a long and needle-like proboscis, many have legs that are noticeably longer and thinner than in similar-sized syrphids)
Their facial cuticle often has prominent bulges and/or beak- to knob-like projections (most bee flies have an evenly curved or sloping face).
The wings are often clear or have smooth gradients of tinting, and their veins merge posteriorly into a "false edge" that runs parallel to the wing's true rear edge and extends along half or more of the wing length (bombyliid wings lack a "false rear edge" and often have large dark areas with sharp boundaries, or complex patterns of spots).
Their abdomens and thoraces often have glossy cuticular body surfaces, abdominal colors are usually mainly due to cuticular pigments (bee flies are usually very hairy, their abdominal colors are almost always due to pigmentation of hairs and not the underlying cuticle).

Reproduction and life cycle
Midair mating of Simosyrphus grandicornis

Unlike adults, the maggots of hover flies feed on a variety of foods; some are saprotrophs, eating decaying plant or animal matter, while others are insectivores, eating aphids, thrips, and other plant-sucking insects.[1][4] Predatory species are beneficial to farmers and gardeners, as aphids destroy crops, and hover fly maggots are often used in biological control. This includes one of the most common widespread hover fly species, Syritta pipiens, whose larvae feed on aphids. Certain species, such as Lampetia equestris or Eumerus tuberculatus, are responsible for pollination.
Hover fly depositing egg on Epipactis helleborine which has ants farming aphids

An example of a well-known hover fly maggot is the rat-tailed maggot, of the drone fly, Eristalis tenax. It has a breathing siphon at its rear end, giving it its name.[1] The species lives in stagnant water, such as sewage and lagoons.[5] The maggots also have a commercial use, and are sometimes sold for ice fishing.[6]
An ichneumonid wasp ovipositing inside a hover fly larva

On extremely rare occasions, hover fly larvae have been known to cause accidental myiasis in humans. This occurs when the larvae are accidentally ingested from contaminated food.[5][7]

The oldest known fossils of crown group Syrphidae are from the Eocene aged Florissant Formation, Green River Formation and Baltic amber. However, the genus Prosyrphus from the Late Cretaceous (Cenomanian) aged Burmese amber appears to represent a stem group to the family.[8]
Distribution and habitat

Hover flies are a cosmopolitan family found in most biomes, except extreme deserts, tundra at extremely high latitudes, and Antarctica.[9][10] Certain species are more common in certain areas than others; for example, the American hoverfly, Eupeodes americanus, is common in the Nearctic realm, and the common hoverfly, Melangyna viridiceps, is common in the Australasian realm. About 6,000 species and 200 genera are in the family.[11]

While some hover fly larvae are aquatic and are often found in stagnant water, those of species that prey upon aphids and other plant parasites are usually terrestrial, residing on leaves.[12] Adults are often found near flowers, their principal food source being nectar and pollen.[2] Some species are found in more unusual locations; for example, members of the genus Volucella can be found in bumblebee nests, while members of Microdon are myrmecophiles, found in ant or termite nests.[1] Others can be found in decomposing vegetation.
Episyrphus balteatus on a daisy
Eupeodes corollae

Hover flies are important pollinators of flowering plants in many ecosystems worldwide.[13] Syrphid flies are frequent flower visitors to a wide range of wild plants, as well as agricultural crops, and are often considered the second-most important group of pollinators after wild bees. However, relatively little research into fly pollinators has been conducted compared with bee species.[13] Bees are thought to be able to carry a greater volume of pollen on their bodies, but flies may be able to compensate for this by making a greater number of flower visits.

Like many pollinator groups, syrphid flies range from species that take a generalist approach to foraging by visiting a wide range of plant species through those that specialize in a narrow range of plants.[14] Although hover flies are often considered mainly nonselective pollinators, some hover flies species are highly selective and carry pollen from one plant species.[15] Cheilosia albitarsis is thought to only visit Ranunculus repens.

Specific flower preferences differ among species, but syrphid fly species have repeatedly been shown to prefer white- and yellow-coloured flowers.[16] Nonvisual flower cues such as olfactory cues also help these flies to find flowers, especially those that are not yellow.[17] Many syrphid fly species have short, unspecialized mouth parts and tend to feed on flowers that are more open as the nectar and pollen can be easily accessed.[18]

Also, a number of fascinating interactions occur between orchids and hover flies. The orchid species Epipactis veratrifolia mimics alarm pheromones of aphids which attracts pollinating hover flies .[19] Another plant, the slipper orchid in southwest China, also achieves pollination by deceit by exploiting the innate yellow color preference of syrphids.[20]
Case study – New Zealand
Main article: Pollinators in New Zealand

More than 40 species of syrphid flies are found in New Zealand[21] in a variety of habitats, including agricultural fields and alpine zones. Two hover fly species in Switzerland are being investigated as potential biological control agents of hawkweeds in New Zealand.[22]

Native hover fly species Melanostoma fasciatum and Melangyna novaezelandiae are common on agricultural fields in New Zealand.[23] Coriander and tansy leaf are particularly attractive to many species of adults, which feed on their pollen.[24] In organic paddocks, hover flies were found to feed on an average of three and a maximum of six different pollens. M. fasciatum has a short proboscis, which restricts it to obtaining nectar from disk flowers.[25]

Syrphid flies are also common visitors to flowers in alpine zones in New Zealand. Native flies (Allograpta and Platycheirus) in alpine zones show preferences for flower species based on their colour in alpine zones; syrphid flies consistently choose yellow flowers over white regardless of species.[26] However, syrphid flies are not as effective pollinators of alpine herb species as native solitary bees.[27]
Main article: Genera of Syrphidae
Relationship with humans

Larvae of many hover fly species prey upon pest insects, including aphids and leafhoppers, which spread some diseases such as curly top, so they are seen in biocontrol as a natural means of reducing the levels of pests. Gardeners, therefore, sometimes use companion plants to attract hover flies. Those reputed to do so include Alyssum spp., Iberis umbellata, statice, buckwheat, chamomile, parsley, and yarrow.

Fredrik Sjöberg's [sv] book The Fly Trap concerns his enthusiasm for hover flies on the island of Runmarö in the Baltic Sea.[28] The island is a hotspot for hover flies and other insects; Sjöberg has collected 58 species of butterflies there, and (in seven years of hunting) 202 species of hover flies, including 180 in his garden.[29]
Identification guides

Skevington, J.H., et al., 2019. Field Guide to the Flower Flies of Northeastern North America. Princeton University Press. This book "covers all 413 known syrphid species that occur in or north of Virginia, Kentucky, and Missouri, west to include Iowa, Minnesota, Ontario, and Nunavut, and east to the Atlantic Ocean, including Greenland."
Stubbs, A. E. and Falk, S. J. (2002) British Hoverflies An Illustrated Identification Guide. Pub. 1983 with 469 pages, 12 col plates, b/w illus. British Entomological and Natural History Society ISBN 1-899935-05-3. 276 species are described with extensive keys to aid identification. It displays 190 species on colour plates. 2nd edition, pub. 2002, includes new British species and name changes. It includes European species likely to appear in Britain. Additional black and white plates illustrate the male genitalia of the difficult genera Cheilosia and Sphaerophoria.
Vockeroth, J. R. "A revision of the genera of the Syrphini (Diptera: Syrphidae)". Memoirs of the Entomological Society of Canada, no. 62:1-176. Keys subfamilies, tribes and genera on a world basis and under regions.
van Veen, M. P. (2004) Hoverflies of Northwest Europe: Identification Keys to the Syrphidae. KNNV Publishing, Utrecht. ISBN 9050111998

Regional lists

List of hoverfly species of Great Britain
List of flower flies of New Zealand
List of the flower flies of North America


"Hover fly". Encyclopædia Britannica Online. 2009. Retrieved December 5, 2009.
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Schmidt, Martin; Thewes, Ulrich; Thies, Carsten; Tscharntke, Teja (2004). "Aphid suppression in mulched cereals". Entomologia Experimentalis et Applicata. 113 (2): 87–93. doi:10.1111/j.0013-8703.2004.00205.x. S2CID 85070615.
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Larson, B.M.H; Kevan, P.G.; Inouye, D. W. (2001). "Flies and flowers: taxonomic diversity of anthophiles and pollinators". Canadian Entomologist. 133 (4): 439–465. doi:10.4039/ent133439-4. S2CID 55767580.
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Haslett, J.R. (1989). "Interpreting patterns of resource utilization: randomness and selectivity in pollen feeding by adult hoverflies". Oecologia. 78 (4): 433–442. doi:10.1007/bf00378732. PMID 28312171. S2CID 9178645.
Sajjad, Asif; Saeed, Shafqat (2010). "Floral host plant range of syrphid flies (Syrphidae: Diptera) under natural conditions in southern punjab, Pakistan". Pakistan Journal of Biology. 42 (2): 1187–1200.
Primante, Clara; Dotterl, Stefan (2010). "A syrphid fly uses olfactory cues to find a non-yellow flower". Journal of Chemical Ecology. 36 (11): 1207–1210. doi:10.1007/s10886-010-9871-6. PMID 20924654. S2CID 23245484.
Campbell, Alistair, J.; Biesmeijer, J. C.; Varma, V.; Wakers, F. L. (2012). "Realising multiple ecosystem services based on the response of three beneficial insect groups to floral traits and trait diversity". Basic and Applied Ecology. 13 (4): 363–370. doi:10.1016/j.baae.2012.04.003.
Stokl, Johannes; Brodmann; Dafni; Ayasse; Hansson (2011). "Smells like aphids: orchid flowers mimic aphid alarm pheromones to attract hoverflies for pollination". Proc. R. Soc. B. 278 (1709): 1216–1222. doi:10.1098/rspb.2010.1770. PMC 3049078. PMID 20943694.
Shi, J.; Luo, Y.B.; Ran, J.C.; Liu, Z.J.; Zhou, Q. (2009). "Pollination by deceit in Paphiopedilum barbigerum (Orchidaceae): a staminode exploits innate colour preferences of hoverflies (Syrphidae)". Plant Biology. 11 (1): 17–28. doi:10.1111/j.1438-8677.2008.00120.x. PMID 19121110.
"Diptera: Syrphidae". Landcare Research. Retrieved 2013-08-30.
Grosskopf, Gitta (2005). "Biology and life history of Cheliosia urbana (Meigen) and Cheilosia psilophthalma (Becker), two sympatric hoverflies approved for the biological control of hawkweeds (Hieracium spp.) in New Zealand". Biological Control. 35 (2): 142–154. doi:10.1016/j.biocontrol.2005.06.013.
Morris, Michael, C. (2000). "Coriander (Coriandrum sativum) "companion plants" can attract hover flies, and may reduce infestation in cabbages". New Zealand Journal of Crop and Horticultural Science. 28: 213–217. doi:10.1080/01140671.2000.9514141. S2CID 86656803.
Hickman, Janice, M.; Lovei, G. L.; Wratten, S. D. (1995). "Pollen feeding by adults of the hoverfly Melanostoma fasciatum (Diptera: Syrphidae)". New Zealand Journal of Zoology. 22 (4): 387–392. doi:10.1080/03014223.1995.9518057.
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