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Rhamphomyia longicauda (long-tailed dance fly)

Rhamphomyia longicauda (long-tailed dance fly)

Female Rhamphomyia longicauda flies, known as long-tailed dance flies, inflate their abdomens during courtship to appear more fecund than they may actually be (uninflated at rest at left, inflated in flight at right). Their leg scales also serve as a sexual ornament to attract males. (Photo by Dave Funk)

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