Hi Rock, that's interesting.
But, one, I found a couple of clip art where they didn't identify the ants, but they had the same/similar feet. There was a really ugly one I discounted. And two, if the flash is attached to the camera, wouldn't the shadow be directly under the image of the foot?
I didn't search a lot, but the one picture of a carpenter ant I looked at seemed to have different body segments, this ant has fat parts in the middle.
It will be interesting to see what it turns out to be.