Rainieria antennaepes is found across the eastern U.S. and belongs to the family Micropezidae, the Stilt-legged Flies. It is the only member of its genus in North America. This species' specific epithet, antennaepes, refers to holding its front legs up in a way that resembles antennae. It's the antennae-foot (antennae + pes) Rainieria.
Rainieria antennaepes in Frederick Co., Maryland (7/11/2020). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC).
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A female Rainieria antennaepes in Baltimore Co., Maryland (5/27/2015). Verified by Ross Hill/BugGuide.
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Rainieria antennaepes in Montgomery Co., Maryland (7/4/2020). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC).
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Rainieria antennaepes in Montgomery Co., Maryland (6/10/2024). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC).
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A Rainieria antennaepes in Baltimore Co., Maryland (7/24/2018). Determined by Yurika Alexander, Jeff Brown, and Even Dankowicz via BugGuide.
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Rainieria antennaepes in Montgomery Co., Maryland (7/4/2020). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC).
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Rainieria antennaepes in Prince George's Co., Maryland (7/10/2019). (c) Sergei Drovetski, all rights reserved.
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Rainieria antennaepes is a species of stilt-legged flies in the family Micropezidae found in North America east of the Rocky Mountains. The name "antennaepes" means "antenna foot". They frequently hold their white-tipped front legs up and wave them around in a manner that makes them appear like the antennae of ichneumonid wasps. They feed on detritus, bird droppings, and similar waste.[1][2][3][4]
Rainieria antennaepes is the only member of its genus found in North America.[4]