Green herons blend into the background so well that I have, on several occasions, found myself looking right at one and not even known it until they take flight. This is why I take such delight in seeing them out in the open. This particular picture was taken while the heron stood and looked around, exploring the water and provided me with a real treat, getting to see the heron from many angles and in many positions.
These birds are about half the size of the great blue heron, and tend to fly much faster and lower. They spook easily so any sighting is great, but a sighting where I get pictures like this is what I consider to be a very good sighting indeed.