I am quite partial to loons, and always love seeing them posted. Nice wing display here, while maintaining reasonable eye contact. I like the water pouring off the breast. The big issue would be the angle of light. Because the dorsal surface of the wings are in the shadow, it doesn't show them off to full effect. You might be able to coax out some more detail in them, but probably not enough to make it a killer image.
The framing is a bit tight on each side for my taste.
Keep them coming! It is also very helpful to include your full exposure data, f/stop , shutter speed, ISO , metering mode, post processing, etc. It helps with the critique!
I tried to tease out a bit more detail from the wings. I think it helps a bit.
Be sure to post the images at 1024 by 800, it gives us a bigger image to view.
Scott
Randy has done a good job of bringing out some nice detail. You've gotten some nice images from the Loon trip....I wish I were there. Things have really changed.....I guess you've got internet now. When I was there cell phones wouldn't even work. Tell Chas I said hi.....and good light!!