, Volume 595, Issue 1, pp 469-475

First online:

Global diversity of black flies (Diptera: Simuliidae) in freshwater

  • Douglas C. CurrieAffiliated withDepartment of Natural History, Royal Ontario Museum Email author 
  • , Peter H. AdlerAffiliated withDepartment of Entomology, Clemson University

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access


Black flies are a worldwide family of nematocerous Diptera whose immature stages are confined to running waters. They are key organisms in both aquatic and terrestrial ecosystems, but are perhaps best known for the bloodsucking habits of adult females. Attacks by black flies are responsible for reduced tourism, deaths in wild and domestic birds and mammals, and transmission of parasitic diseases to hosts, including humans. About 2,000 nominal species are currently recognized; however, certain geographical regions remain inadequately surveyed. Furthermore, studies of the giant polytene chromosomes of larvae reveal that many morphologically recognized species actually consist of two or more structurally indistinguishable (yet reproductively isolated) sibling species. Calculations derived from the best-known regional fauna—the Nearctic Region—reveal that the actual number of World black fly species exceeds 3,000.


Simuliidae Lotic Filter-feeders Bloodsuckers Sibling species Bioindicators