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bee fly

bee fly, name for the small- to medium-sized flies of the family Bombyliidae, many of which resemble bees in appearance and behavior. This mimicry provides bee flies with some measure of protection against predators that have learned to avoid the sting of true bees. A bee fly has a stout, hairy body and long proboscis. In many species the body and wings are strikingly marked in yellow and brown. Most are very swift fliers and buzz loudly like a bee if caught in a net. They seek heat and are often found flying close to the ground in dry, sandy regions. The adults feed on nectar and hover above flowers like bees. The larvae feed on larvae or pupae of other insects; they are beneficial as parasites of harmful species. Beelike flies are also found in other families. The syrphid flies (family Syrphidae), also called hover flies and flower flies, are a large, cosmopolitan group of beelike and wasplike flies. Many syrphid flies bear a very close resemblance to a particular bee or wasp species. Many of the robber flies (family Asilidae) resemble bumblebees. All of these are true flies; they are classified in the phylum Arthropoda, class Insecta, order Diptera.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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