Stilt-Legged Fly - Taeniaptera trivittata
FamilyMicropezidae - Stilt-Legged Flies
Live adult flies photographed at Black Partridge Preserve, Cook County, Illinois, USA.
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Stilt-Legged Fly - Taeniaptera trivittata
Stilt-Legged Fly

I would have called this the "semaphore" fly, because it constantly waves its front legs around as if signaling someone or something. Family Micropezidae consists of about 40 genera with 475 described species worldwide.

I have always found this species in wooded settings near flowing water.

Stilt-Legged Fly - Taeniaptera trivittata
Click Here  for a Quicktime video of this fly waving its hands

Stilt-Legged Fly
This Micropezidae, a smaller species at 10mm, remains unidentified.

References

1. Bugguide.net Micropezidae

 

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