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This occurs when the larvae are accidentally ingested from contaminated food. On extremely rare occasions, hover fly larvae have been known to cause accidental myiasis in humans. Their abdomens and thoraces often have glossy cuticular body surfaces, abdominal colors are usually mainly due to cuticular pigments (bee flies are usually very hairy, their abdominal colors are almost always due to pigmentation of hairs and not the underlying cuticle).Īn ichneumonid wasp ovipositing inside a hover fly larva.The wings are often clear or have smooth gradients of tinting, and their veins merge posteriorly into a "false edge" that runs parallel to the wing's true rear edge and extends along half or more of the wing length (bombyliid wings lack a "false rear edge" and often have large dark areas with sharp boundaries, or complex patterns of spots).Their facial cuticle often has prominent bulges and/or beak- to knob-like projections (most bee flies have an evenly curved or sloping face).The legs and mouthparts of hover flies are usually not particularly long and thin (some bombyliids have a long and needle-like proboscis, many have legs that are noticeably longer and thinner than in similar-sized syrphids).Hover flies can, nevertheless, be distinguished in the field by anatomical features such as: īee flies of the family Bombyliidae often mimic Hymenoptera and hover around flowers, as well, rendering some bombyliid species hard to tell apart from Syrphidae at first glance. Many species also hover around flowers, lending to their common name. With a few exceptions, hover flies are distinguished from other flies by having a spurious vein, located parallel to their fourth longitudinal wing vein. tenax, are an example of a species of hover fly who exhibit Batesian mimicry. Despite this, hover flies are harmless to humans. Due to this coloring, they are often mistaken for wasps or bees they exhibit Batesian mimicry. Many species are brightly colored, with spots, stripes, and bands of yellow or brown covering their bodies. As members of the Diptera, all hover flies have a single functional pair of wings (the hind wings are reduced to balancing organs). Some, such as members of the genus Baccha, are small, elongated, and slender, while others, such as members of Criorhina, are large, hairy, and yellow and black. The size of hover flies varies depending on the species. Hover flies are harmless to most mammals, though many species are mimics of stinging wasps and bees, a mimicry which may serve to ward off predators. Hover flies are common throughout the world and can be found on all continents except Antarctica. Insects such as aphids are considered a crop pest, and therefore the aphid-eating larvae of some hover flies serve as an economically (as well as ecologically) important predator and even potential agents for use in biological control, while the adults may be pollinators.Ībout 6,000 species in 200 genera have been described. In other species, the larvae are insectivores and prey on aphids, thrips, and other plant-sucking insects. In some species, the larvae are saprotrophs, eating decaying plant and animal matter in the soil or in ponds and streams. As their common name suggests, they are often seen hovering or nectaring at flowers the adults of many species feed mainly on nectar and pollen, while the larvae ( maggots) eat a wide range of foods. By now you’re probably wondering what website offers all these and more.Hover flies, also called flower flies or syrphid flies, make up the insect family Syrphidae.
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