Just digged a bit in the internet, so there are mules and hinnies:
https://www.mypetchicken.com/backyard-chickens/chicken-help/What-are-mule-ducks-H460.aspx
https://www.feathersite.com/Poultry/Ducks/Musc/Mule.html
https://en.wikipedia.org/wiki/Mulard