Thought this might be of interest to some - it is in Texas but worth a look.
A rare leucocystic trumpeter swan was observed. This means they are
genetically born white and have yellow legs even as adults. I did note the
coloration of the bill is not entirely black but I have seen this in other
swans of this genetic type.

Subject: Rare leucystic color phase Trumpeter Swan now present in Midland,
Texas

Please visit http://midlandnaturalists.org/bird-photos/ to see photos of
this swan.

Also, there was a discussion about its correct ID on Burr Williams' Facebook
page at http://www.facebook.com/profile.php?id=1337305398

Martha Jordan
425-787-0258