Tabanus sudeticus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Diptera
Family: Tabanidae
Subfamily: Tabaninae
Tribe: Tabanini
Genus: Tabanus
T. sudeticus
Binomial name
Tabanus sudeticus
Zeller, 1842[1]
  • Tabanus verralli Oldroyd, 1939[2]
  • Tabanus sudeticus f. confusus Goffe, 1931[3]
  • Tabanus sudeticus f. distinctus Goffe, 1931[3]
  • Tabanus sudeticus f. meridionalis Goffe, 1931[3]
  • Tabanus sudeticus var. perplexus Verrall, 1909[4]

Tabanus sudeticus, also known as the dark giant horsefly, is a species of biting horse-fly.[5][6] It is the heaviest fly in Europe.[7]


The dark giant horsefly's length is around 20-25 millimeters.[8] They have uniform dark brown eyes.[8]

Dark giant horseflies are a common species to be found buzzing around cows and horses.[8] They usually only suck blood from those horses and cows, avoiding humans.[8] They fly with a very loud buzzing.[8][9]


Female T. sudeticus

Tabanus sudeticus is found in many countries of Western Europe. It has a marked northern and western distribution; being found as far north as southern Norway and the Western Isles of Scotland, and with an occasional record from Belarus.[10]


  1. ^ Zeller, P.C. (1842). "Dipterologische Beytrage. Zweyte Abtheilung". Isis (Oken's). 1842: 807–847.
  2. ^ Oldroyd, H. (1939). Tabanidae. In Edwards, F.W., Oldroyd, H. & Smart, J., British blood-sucking flies. Vol. 8. London. pp. 1–156.((cite book)): CS1 maint: location missing publisher (link)
  3. ^ a b c Goffe, E.R. (1931). "British Tabanidae (Diptera). With an account of the principal variation. With descriptions of a number of new forms, and of some additions to the British List". Transactions of the Entomological Society of the South of England. 6(1930): 43–114.
  4. ^ Verrall, G.H. (1909). Stratiomyidae and succeeding families of the Diptera Brachycera of Great Britain In his British flies. Vol. 5. London: Gurney & Jackson. pp. 780 pp. Retrieved 14 October 2022.
  5. ^ Moucha, J. (1976). "Horse-flies (Diptera: Tabanidae) of the World. Synoptic Catalogue" (PDF). Acta Entomologica Musei Nationalis Pragae Supplements. 7: 1–320. Retrieved 11 September 2022.
  6. ^ Stubbs, A. & Drake, M. (2001). British Soldierflies and Their Allies: A Field Guide to the Larger British Brachycera. British Entomological & Natural History Society. pp. 512 pp. ISBN 1-899935-04-5.
  7. ^ "Check out this massive fly". Naturenet. 7 June 2009. Retrieved 25 August 2020.
  8. ^ a b c d e THES, MoveCMS by. "Dark giant horsefly | Animal | Life Habitats". Retrieved 2022-09-17.
  9. ^ Chvála, Milan; Lyneborg, Leif; Moucha, Josef (1972). The Horse Flies of Europe (Diptera, Tabanidae). Copenhagen: Entomological Society of Copenhagen. pp. 598pp, 164figs. ISBN 978-09-00-84857-5.
  10. ^ "Dark Giant Horse Fly Tabanus sudeticus". iNaturalist. Retrieved 10 June 2020.
Female; Detail of head