We think that you may be describing a leucistic coloration known as the Mearl or Silver Swan. We are attaching a photo taken by Bob Knox of Knox Swans. A leucistic coloration means that there is a lightening or abnormal presentation of the normal coloration, but there is still color. Albino means lack of color so that a true albino would have no coloration and the eyes would probably be pink in color and the bird possibly blind.

The leucistic coloration is a genetic mutation and can show up at anytime as long as one or both of the black swans has the recessive gene. On another note, two leucistic colored swans usually do not produce the coloration and in our experience, they do not produce offspring. This does not necessarily mean that they are sterile as we have seen them re-paired with another black swan and they do produce normal colored offspring. We hope this helps. Please let us know if this is the coloration that you are seeing. If not, please send us a photo and we'll see if we can come up with an answer for you. The Regal Swan