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The Asilidae are the robber fly family, also called assassin flies. They are powerfully built, bristly flies with a short, stout proboscis enclosing the sharp, sucking hypopharynx. The name "robber flies" reflects their notoriously aggressive predatory habits; they feed mainly or exclusively on other insects and as a rule they wait in ambush and catch their prey in flight.
On my deck.
Interesting, I thought it was a horsefly, at first.
Spotted on Aug 18, 2018
Submitted on Aug 18, 2018