Dainty Ducks!

I have no idea what kind of ducks these are. I did a Google search and the only white ducks mentioned are Aylesbury Ducks and Pekin Ducks. This wee quintet have been on the loch in the James Hamilton Heritage Park for about a week (so an elderly gentleman told me) but where they came from no one seems to know. I think they are quite young as they are much smaller than the mallards and they certainly kept together as they paddled about.