There are about 800 species of Conopids with around 80 in the US. They are a fairly well-known family whose biology is vastly different from other flies. Most are parasitoids and mimic wasps and bees with their bright colors or markings; they hang around flowers waiting for the right hosts. They are not host specific but tend to want to oviposit into Hymenoptera; which they do with a “can opener” type modification on their abdomen allowing them to pry open the host so they can deposit their egg. Larvae develop inside the wasp or bee.
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