black fly


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black fly

black fly, name for any of the flies of the family Simuliidae. The black fly is about 1-8 in. (3.2 mm) long and has large eyes, short legs, a stout, humped back, broad gauzy wings, and piercing-sucking mouthparts. The female inflicts a painful bite, sucking the blood of birds and mammals, including humans. Livestock and other large mammals may be bitten to death by swarms of black flies; the black fly problem of some subarctic regions is so severe as to make human settlement impossible. Some tropical African and American species carry the larvae of roundworms that in human hosts cause swellings of the skin and eyes and sometimes blindness. The eggs of black flies are commonly laid in masses on wet rocks, logs, and plants; the larvae live in fast flowing water, clinging to rocks by means of anal sucking disks and straining out organic matter by fanlike head organs. Pupation occurs underwater; the pupa accumulates a bubble of air in its case, enabling it to rise to the surface and emerge when mature. The Adirondack black fly, Simulium hirtipes, the white stockinged black fly, S. venustum, the buffalo gnat, S. pecuarum, and the turkey gnat, S. meridionale, are common species. Black flies are classified in the phylum Arthropoda, class Insecta, order Diptera, family Simuliidae. See insect.
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Various keywords utilized in the search strategy included the following: onchocerciasis, river blindness, human landing catches, sticky traps, light trap, human silhouettes, Esperanza window traps, insect adhesives, and black fly. Various combinations of key words were made using "AND" and "OR" as Boolean operators.
In the Kluane Lake region (Yukon, Canada), roost site selection of alpine-breeding Great Horned Owls varied with black fly activity (Rohner et al., 2000).
To coincide with the change in the Gritty Dozen, the Black Fly Stout and the Best Bitter will transition from 12-ounce to 22ounce bottles and will be available in 5 liter mini kegs and on draft.
Three people suffered anaphylactic shock after suffering dozens of bites from a common species of the black fly simulium lineatum and simulium variegatum.
In keeping with Canada's long tradition of resource-based trade, the levy will be in the form of a proportion of our most underutilized resource: the aforementioned black fly and mosquito populations.
One-half of the sample responded to a contingent-valuation mail survey in August and September 1987, at the peak of the black fly season.
The dog was from the Hollywood Hills area of Los Angeles, [approximately equal to] 3 km south of the 29-km black fly control zone of the Los Angeles River.
Q Is there any scientific basis preventing black fly attacks on broad beans by pinching out the tops of the plants in late spring?
In fact, if there are a lot of resident fish suffering from "lockjaw", a black fly is great, last thing, to attract coloured salmon, particularly hens.
The energetic Jay Adams has been giggling at Black Fly's House Of Flys in Honolulu.
River blindness, which mostly affects residents of parts of Africa and South America, is passed from person to person by an insect called the black fly.