Muscovy duck
In 2014, ducks accounted for 95% of foie gras production. The breeds primarily used are the Muscovy duck ("Cairina moschata") (also called the Barbary duck) and the hybrid cross of a male Muscovy duck and a female Pekin duck ("Anas platyrhynchos domestica") called the Mulard duck. This hybrid is sterile and is therefore sometimes referred to as a "mule" duck. Mulards are estimated to account for about 35% of all foie gras consumed in the US. About 95% of duck foie gras production from France comes from force fed Mulards and the remaining 5% from the Muscovy duck.