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Two lake flies observed in Neenah, Wisconsin, after the yearly hatch in Lake Winnebago. The Chironomidae (informally known as chironomids, nonbiting midges, or lake flies) comprise a family of nematoceran flies with a global distribution. They are closely related to the Ceratopogonidae, Simuliidae, and Thaumaleidae.
A midge is any small fly, including species in several families of non-mosquito nematoceran Diptera. Midges are found (seasonally or otherwise) on practically every land area outside permanently arid deserts and the frigid zones.
Cecidomyiidae is a family of flies known as gall midges or gall gnats. As the name implies, the larvae of most gall midges feed within plant tissue, creating abnormal plant growths called galls . Cecidomyiidae are very fragile small insects usually only 2–3 mm (0.079–0.118 in) in length; many are less than 1 mm (0.039 in) long.
Ceratopogonidae is a family of flies commonly known as no-see-ums, sand flies or biting midges, generally 1–3 millimetres (1 ⁄ 16 – 1 ⁄ 8 in) in length. The family includes more than 5,000 species, [2] distributed worldwide, apart from the Antarctic and the Arctic. A 2025 study from Oxford University lists the subspecies Ceratopogonidae ...
Thaumaleidae, the solitary midges or trickle midges, are a group of nematoceran flies related to the Ceratopogonidae, Chironomidae, and the Simuliidae. They are small, stocky, yellow to brown flies (3–4 mm). Very few species are known for this family (about 120 species in five genera).
Chironomoidea show a range of habitats and diets. Using the family Chironomidae as an example, larvae occur most commonly in aquatic vegetation and benthic debris, but also in sand covered in fine organic material, pools on granite outcrops, wood snags, muddy lake beds and hygropetric seepages. Pupae may occur near the surface of water, in ...
The members of the family are sometimes known as frog-biting midges. The family currently consists of just one genus, totalling 115 extant and 10 fossil species worldwide. Most extant species are found in the lower latitudes, usually associated around the tropics. [1] They are tiny flies with a wing length of 0.6-2.5 mm.
As nematoceran flies, sciaroid adults generally have long segmented antennae, while their larvae have a well-developed head and mouthparts. [1] Aside from this, sciaroids vary in appearance. For example, Sciaridae adults have each eye extended dorsally to form an "eye bridge", a feature not found in related families. [2]