Duck interbreeding?

Duck interbreeding?

Observation - Duck interbreeding? - UK and Ireland. Description: Anyone know what interbreeding caused these ducks. Pair seen on Calder Washes yesterday. Bigger than mallard but obviously have some mallard content.

Anyone know what interbreeding caused these ducks. Pair seen on Calder Washes yesterday. Bigger than mallard but obviously have some mallard content.