Thank you! I can't take credit for the colors with which Mother Nature blessed us on that early Summer day.....but, yes, when shooting birds in the water I always am mindful to check for a reflection, as that can add such impact to an image. Shooting something in the water or actually just the water itself also is fun because depending upon lighting, time of day, the angle at which I approach the subject, the colors of and in the water can change dramatically as well. Some days the lake looks positively green, such as in this image. Other days it is more brownish/grey, especially after a rain and/or when it is cloudy and dreary. The season of year makes a difference, too, of course. Right now I'm looking out the sliding glass door at the lake and it is vividly green thanks to the sun lighting up the newly-emerged foliage and tree leaves across the lake from me.
When I shoot I always pay attention to what is around the subject, behind it, above it, below it and beside it, as that is a key part of composition. Regardless of the subject, whether it's Alfred or a flower, eliminating unnecessary distractions and elements from the scene is key in contributing to the impact of the final image. Of course it's easier to manage this when shooting a non-moving subject under controlled conditions such as shooting a still life/tabletop or macro image indoors. With wildlife, one has no control over the subject! In post-processing/editing there is also the opportunity, if needed, to clone out (remove) an errant offending distraction which either went unnoticed at the time of shooting or was noticed but couldn't be changed due to the situation.
Also in the editing process, when one shoots in RAW, as I do, there is the latitude to adjust contrast, color, exposure values, etc., as needed and to taste. Just as in black-and-white imaging, contrast plays a key role in color photography as well. Sometimes it becomes the subject itself, and definitely part of the overall impact in, say, a simple abstract image with two or three bold contrasting colors. In this particular image, of course, as you noted, SS, the varying shades of green complement each other and then there is Alfred, with his blue-and-creamy white coloring, who provides the contrast, standing out from the background. What also makes this image interesting to the viewer is that Alfred is not just standing there gazing vaguely off into the distance; the fish in his mouth adds the bit that often is the first thing to grab the viewer's attention. Another colorful contrasting element is Alfred's yellow, piercing eye, which again is an attention-grabber.
Now that spring/early summer is upon us I am looking forward to spending time again with Alfred in the water and me on the boardwalk or the path, wherever I can get a good angle......and also shooting his fellow herons and the geese, ducks and cormorant(s) who also share the lake with the humans here.