Thanks everyone for the comments. It does appear to be coparenting. The number of total ducklings has remained constant but the number per mom has been changing almost daily.
First off I do not own any ducks, just rabbits and cockatiels, but my area has a lot of muscovies. I've taken interest in the local moms and have been watching some nearby nest. Earlier this week 2 moms had hatchlings and so far and have seen some interesting behavior I want to know more about...
