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Conopidae (Thick-Headed Flies)
These wasp-like flies like to bask in the sun, and often obtain nectar from various flowers. The heads of some species are unusually wide. The larvae are parasitoid on various species of bees and wasps. The adult females sneak up on these hymenoptera during flight and lay an egg on the abdominal region. Thick-Headed flies are fairly effective pollinators of many wildflowers, but are less common visitors than Syrphid or Tachinid flies.

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