Living just north of the Canada-US border, our
chickens here stop laying for a good part of the winter without supplemental light. To some extent this is manageable by having pullets just come into lay and I am also trying to select for shorter-daylight layers by incubating chicks from the earliest spring eggs. But ducks seem another good solution to the winter egg shortage.
Do all duck breeds lay well in winter? I have seen Khaki Campbell, Welsh harlequin and I think Indian runner mentioned as winter layers. What about Muscovies or is it only the mallard types?