A male goose you might take a look at
... 
Take the duck to the vet keeping it as comfortable as possible (a soft towel in a 
box)... [DOC] [TLE] Be A Better Birder: Duck and Waterfowl Identification - Bird Academy [PAR] will look at what waterfowl are, give you little introduction to them, and then we .... 
a lot of domesticated ducks and geese, and you will encounter these guys.