Ducks mites and lice

[Jaxall]

Do ducks get Mites or lice? I have 5 ducks and 2 geese and the ducks are just now fully feathered but my muscovy looks weird around her tail. Idk if it's just not grown in yet or a parasite problem maybe. Is this a problem usually with them?

 

[sourland]

I have never encountered ducks or geese with mites/lice. I suppose that if kept in deplorable conditions it might happen. Muscovies frequently tend to look a bit raggedy until they molt.