I have two mallard hens (something got my drake) and 9 Muscovies. I found my mallard hen sitting on a pile of eggs in the middle of an iris bed. she gets off them at dusk and I was able to see all large white eggs...muscovies and one brown egg in there. I see no what I call army green eggs from her? I have guineas, and all brown or bluish green EE layers? Now, I noticed her missing during the daytime a couple days ago but always there at roosting time. Last night, at roosting time, she was off the eggs again. Now was she just eating and drinking or does she stay off them all night? There are 8 or 9 eggs in the pile. I didn't touch them. Will there come a time when she will stay on them to incubate them? I have never had ducks hatch before so I am curious. Thanks in advance.