Whilst I appreciate you only had a certain amount of time to capture this, the swan is grossly overexposed. If your camera has a bracketing function you may find it useful to get correctly exposed images when you are restricted timewise to capturing a shot.
Also you may want to post full size images here as people are reluctant to click on a photo to view it properly. There are lots of threads on this. Effectively it means uploading your image to flickr and then clicking on the photo, then clicking on “All Sizes” and then choose a size and paste the URL into the thread.