I think it's around 27 days.
The hen sits three weeks on it's eggs before it hatches
The term is Brooding
They won't if they go cold, which will likely happen if she leaves the nest, unless the eggs are artificially incubated, instead of the mothers heat, the growing chicks inside will die. It appears mother ducks will leave the nest during the laying phase and as long as it doesn't get below freezing outside, the eggs will do fine!
A duck will sometimes sit on unfertilized eggs. Usually, after a while the duck will come to realize that the eggs are not going to hatch and she will give up and move on.
10000 hours
1 day
Chipmunks do not lay eggs, they are mammals and give birth to live young.
The female kakapo incubates her eggs for around 30 days.
approcimatly 21 days
ostrich can sit very long time in her eggs. sometimes ostrich sit on her eggs until it hatch.
until the egg is ready to hatch. : p
Geese do not get pregant. They lay eggs and sit on a nest.
Tortoise do not sit on their eggs (they are not warm blooded so they can not warm them), they bury them in a nest made in a warm moist place and they hatch naturally.
they often sit over there hole for a long time
Peahens do not become pregnant, they lay and sit on eggs.
Yes. She believes all the eggs are fertile. Ducks have been known to sit on objects similar to eggs such as golf balls.