Dean...
Thank you. I appreciate knowing your preferences as it helps me to look at my own images more objectively.
Nick...
Thank you, as always. The 1st image has no NR, and if you were viewing it full size it would be easier to see in that there is some graininess in the shadow areas. In the rest of the images I applied NR to the background, and the shadow areas (softer) but not to the lighter areas (head of the bird and upper wings)
With respect to the herons not being in an area that you can get close to, it is great that you are aware of this.
Thank you to all.