Nice shots.
It might be the hosting site, but these picture appear not as sharp as they might actually be.
The ducks in the last shot look like they have artifacts around the edges.
And there is some weird stuff going on in the second shot. I looked at the full sized shots on WebShots and the image is kinda noisy and lacks sharpness.
The problem isn't as bad in the first shot, but it doesn't seem as sharp as it could be.