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Balloon flies - Hilara - male

Balloon flies - Hilara - Male
Holly Ridge, Onslow County, North Carolina, USA
May 4, 2013
Discovered these in my backyard one windy spring day - what a sight! Balloon flies (family Empididae), but which species? Sorry for poor image quality, but this nuptial swarm was very difficult to photograph. Dark and light bands on abdomen and enlarged "claws" on front legs of males may be useful traits for identification.

Moved from Empidinae.

Moved from Flies.

Two genera of balloon flies: Hilara or Empis (Enoplempis). The former has a short beak and swollen fore tarsi, the latter has a long beak in the only regional species E. snoddyi.

These seem to have swollen fore tarsi.

Moved from ID Request.

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