I found it! It is an Egyptian goose. Not native to the US. I don't have a clue where it came from...
I'm pretty sure I had a mulard once, picked up with a bunch of other pure bred hatchery ducks from a private owned farmers market that sells all sorts of poultry in the spring.
Thing was the smallest ended up growing super quick and got bigger than the pekins, was super ugly but not a moscovy, had huge wings that were so big it couldn't even tuck them in all the way.

