Duck? Duck or Goose?

It's another 65F day here in Austin. A great day to wander around Lady Bird Lake. There're tons of waterfowl overwintering here, but this guy's my favorite.

I think he's a goose, but he may be a duck... I really don't know. He was about six times bigger than the wood ducks and he posed for me for a good 20 minutes. I have no idea what I'm going to do with my goose-feet series, but they were just so interesting. What can he possibly use his crocodile claws for?