What's That Bug? does not endorse extermination

Subject: strange fly looks like wasp in flight
Location: north east Alabama
July 27, 2013 12:02 am
recently had home invaded by this strange fly,has black and clear body with white socks on legs no stinger but looks much like a wasp when in flight.
Signature: dan

Window Fly "Invasion" ends in Carnage

Window Fly “Invasion” ends in Carnage

Dear Dan,
These are Black Soldier Flies, Hermetia illucens, also known as Window Flies because of the clear spaces in the abdomen which causes them to resemble stinging Thread Waist Wasps, which might be a defense mechanism for this benign and harmless species.  Do you have a nearby compost pile?  The larvae of Black Soldier Flies are beneficial in the compost pile.  You can read more about Black Soldier Flies on BugGuide.

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What's That Bug? does not endorse extermination
Location: Alabama

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