Artie - the black spot is a reflection from a dark spot on the lake shore behind the bird. I could probably do some Ps work to reduce or eliminate it - just hadn't noticed it to be an issue. And thanks for the HA tip - another one of those little gems you freely hand out

. If you could have seem me trying to get sharp images while laying flat on my back in the canoe with my left hand over the canoe side trying to paddle it into the right orientation to the bird while holding the camera in my right hand and resting the end of the lens on my knee as a brace. Quite a show.