I was walking around the small pond when something moved on the other side and it caught my attention.  When I looked closer I spotted the bird (in the middle of the first picture).  This image was as large as I could get it with the effective 200mm lens I had with me.  When I got back home and put it on my monitor I could see it was a green heron.  Look closely in the middle of the second image (a crop from the first image).  If it hadn’t moved I would never had seen it with the naked eye.