This is a wasp. Not sure of the exact ID but might be family Sphecidae (commonly called "thread-waisted wasps"). Most of the Sphecid wasps have a habit of nesting in small holes or digging burrows in soil. Did you notice any such behaviour?
Nice image, the greens look good against the dark colour of the wasp. Do check the focus point, and I would also try pulling down the highlights a little.

TFS. I'm really liking your wasp images , look forward to more.