When they do that they're not fertile or have gone bad ie they're no longer alive in there. Just remove them if you see them out. Also it's a possibility that she's on too many eggs. Sometimes other hens will lay their eggs near the sitting hen then push them under her! Nice huh? I always candle my eggs first before I throw them away. Don't leave them there or the birds MIGHT eat them.
Ducks lay eggs, usually in a nest. This nest may be on the ground, or up inside of a tree trunk.
Ducks typically lay their eggs in nests that they build on the ground, often lined with grass, feathers, and down for insulation. The female duck will find a secluded spot near water to build her nest and lay her eggs.
Ducks usually lay their eggs in a nest made from grass, leaves, and feathers. They will choose a secluded spot near water, such as by a pond or stream, to build their nest and lay their eggs.
To encourage ducks to lay eggs in their nest, provide a safe and comfortable nesting area with soft bedding material. Ensure the nest is in a quiet and secluded location to make the ducks feel secure. Additionally, provide a consistent supply of food and water to support their egg-laying process.
Mostly the ground in thick bushes to hide their nest easier
they might be duds
She gets off the nest to eat, drink, and get wet, in order to provide humidity in the nest.
Ducks leave their eggs unattended at times to go feed, rest, or protect themselves from predators. They rely on their camouflage and the warmth of the nest to keep the eggs safe while they are away.
Not by choice. They usually nest in tall grass or weeds.
No, not if you want the bird to return to incubating the eggs.
No, they occasionally leave it to get water and/or food
Yeah, most likely, especially if her young are still there. This is not, of course, reason to disturb her nest yourself. And actually, under the Migratory Bird Act, it is illegal to disturb the nest, eggs, or young of native birds.