I got lucky again...

The back door was open. The camera was handy. He had his back to me. I crept round the side of the house and got as close as I dared. I took a couple of shots before he heard me and took off, frogless. Fairly pleased with this shot but will have the camera handy with better settings before he returns again. This was the fourth sighting in four days, so I'm confident he'll be a regular visitor and I'll get another chance.