Robber Fly - Laphria grossa
Order Diptera / Suborder Brachycera / Infraorder Muscomorpha / Family Asilidae -- robber flies 
Live adult fly photographed at West Chicago Prairie, DuPage County IL on June 19, 2005. Size: 30mm
Prey item: leaf beetle, Anomoea laticlavia : size: 10mm
 

Robber Fly - Laphria grossa

This lucky gal has caught a clay-colored leaf beetle, and is busy sucking down its liquified insides through it sabre-like proboscis.  When she flew by me carrying this large beetle, she was making one very loud, low-pitched buzz. It's a marvellous sound, and these large robbers fly slow enough they are easily followed. Sometimes they'll even sit still and pose, if you approach slowly and carefully you can get withing a few inches. And that's a thrill for me. I lose all track of time while stalking a big fly like this!

Robber Fly - Laphria grossa

Male Brownbelted Bumble Bee - Bombus griseocollis
Male Bumble Bee
Female Robber Fly, Laphria grossa
Female Robber Fly

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