Correction!

I am pretty sure that my post that I called Snow Geese should have been called Tundra Swans. I got a good look, in good light with binoculars, at big flocks of similar sounding white birds, and they were clearly swans, not geese.

When I asked a refuge manager about it, he said that the swans there are tundra swans. In a few months, they will be migrating a couple of thousand miles to the Northern Canadian tundra. He told me that anecdotes from the 1950's say that the flocks of swans coming into Back Bay were so huge that they darkened the skies. That certainly tells some grim tales about wetland habitat loss.