Maybe a Golden Back Snipe Fly?
This thing was big! I’ve seen a couple of these buzzing around a flowering shrub this summer. This one had gotten trapped in our screened back porch. It buzzed around like mad, then settled down so I photographed it at length. Then it dropped down dead. Must have been the 108 degree temperature. It’s been mighty hot here in the Ozarks the past week or so. And bone dry. I cropped and compressed this photo so it wouldn’t be huge. I have numerous HQ photos of this insect if you want. I’m sure it’s a "fly" of some sort, just unsure as to what. Thanks!
Mnt. Home, AR
This is one of the Giant Robber Flies, the Red Footed Cannibalfly, Promachus rufipes. It is also known as a Bee Panther. BugGuide has some great photos.