Ceratopogonidae, or biting midges (or, in the United States, no-see-ums, sand flies, punkies, and others), are a family of small flies (1-4 mm long) in the order Diptera. They are closely related to the Chironomidae, Simuliidae, and Thaumaleidae. They are found in almost any aquatic or semiaquatic habitat throughout the world. Females of most species are adapted to suck blood from some kind of host animal. Culicoides, Forcipomyia (Lasiohelea), and Leptoconops suck vertebrate blood. Some Atrichopogon and Forcipomyia are ectoparasites on larger insects. Dasyhelea feed exclusively on nectar. Species in other genera are predatory on other small insects. Larvae are always found in some damp location, such as under bark, in rotten wood, compost, mud, stream margins, tree holes, or water-holding plants (i.e., phytotelmata). Many of the blood-sucking species, or those that feed via hematophagy, are pests in beach or mountain habitats. Other species are important pollinators of tropical crops such as cacao. The blood-sucking species may be vectors of disease-causing viruses, protozoa, and filarial worms.
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