I have two ducks, a muscovy and a pekin. The pekin is the drake. Will they mate and have fertile eggs?
Muscovy & Pekin: Will they have fertile eggs?
Muscovies are Cairina moschata while Pekins are mallard derived (Anas platyrhynchos)
They are two different species, and if you cross them, you'll get a Mule Duck or Mulard. These offspring will be sterile, and are commonly the ducks used in foie gras production.