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Photo#1286607
Mystery fly - Archytas

Mystery fly - Archytas
Berryton, Shawnee County, Kansas, USA
September 3, 2016
These, about the size of a housefly, are all over the flowering onion chives. I can't identify what they are. They don't seem to be bees, more of a type of fly. Am I right?

Moved
Moved from Archytas.

Moved
Moved from ID Request.

 
Mystery fly
Thank you! I finally figured out you gave me a one word identifier, archytas, from which I figured out they are pretty good flies, being pollinators.

 
They eat caterpillars
In addition to taking nectar, these flies deposit maggots which wait for a large caterpillar to pass by, grab on, burrow inside, and eat it. They prefer caterpillars in family Noctuidae.

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