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Photo#258958
Swarm of Black Flying Insects - Dolerus

Swarm of Black Flying Insects - Dolerus
Lexington, Fayette County, Kentucky, USA
March 17, 2009
Size: 3/4 Inch
We have a bunch of these little flying insects around our house. Neighbors have them as well. If you walk past them, they will fly at you quite aggressively. Any ideas as to what they are?

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Swarm of Black Flying Insects - Dolerus Swarm of Black Flying Insects - Dolerus Swarm of Black Flying Insects - Dolerus Swarm of Black Flying Insects - Dolerus

sawflies, vegetarian wasps
100% harmless to humans/households -- dunno what they do in your homes, though

 
Stingless, too.
They are simply emerging en masse from cocoons. Startled from their perches they may fly, but certainly not "aggressively," just randomly:-) Enjoy the spectacle fearlessly.

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