Several wild ducks did come by for a good part of the summer, and all got along quite well.And they do breed!
But, I do remember one occasion just after the wild ducks came by. They all followed me up the hill from the pond. All of a sudden, a car door slammed and they became frightened.
The wild ducks just took off and flew right to the pond. But our domestic duck first stopped, and just looked up at the “flying ducks”. It really looked like they were puzzled! They then started scrambling to the pond!
By the fall, the wild ducks did leave, and a couple or our other ducks have disappeared. The remaining five ducks are now quite a close nit flock.
Later, we did have had a wild female duck come by and stay!