They are mallards with domestic genes dominating... Domestic mallards
tend to be larger and more aggressive than their wild kin - Jim Greaves

At 01:01 PM 12/6/2008, Marvin Hoekstra wrote:
>Meanwhile I saw a pair of ducks or geese
>somewhat larger than mallards standing on the shore. I was not able to
>identify them, although they are probably a form of some common species.
>Check out these photos if you can help identify them:
>
>http://www.flickr.com/photos/21019806 at N05/
>
>Thanks,
>
>Marvin S. Hoekstra