She should be ok, but just to be safe, we would send a boat out to make sure she does not have some injury to a wing or other body part preventing her from flying. Swans need to get out of the water to preen and dry so that their wings can be water repellent and they do not drown. Are you sure she is not leaving the water when you are not around? Please let us know how this works out. The Regal Swan