I saw a small flock of three geese and something else, and smaller. It wasn't a duck. The wing flapping was the same. I would say a midget goose or a seagull. Is that commonplace?
Here are a couple beside a pintail. You can really tell how small they are here.
They are neat little birds...They fly very similar to a duck. When we were hunting them we also noticed that they flew early with the ducks, unlike the canadas that were flying later in the day.