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ostrich can sit very long time in her eggs. sometimes ostrich sit on her eggs until it hatch.
10000 hours
After the penguin egg is laid, the male will sit on the egg while the females leave to find food. The males will sit on the eggs for a full two months before the egg hatches.
for 21 or 22 days.
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
Well to hatch any egg you need warmth. Either you let the mother hen (or a surrragate mother) sit on the eggs until they hatch, or you can incubate them. They usually take an average 21 days to hatch. It can be risky letting a hen sit on eggs, because some chickens (particularly silkies) will sit on the eggs for so long they forget to take breaks for food and water. All you can do is wait and see. If her condition is deteriorating too quickly. Take the eggs from her. Other than that, silkies are one of the best breeds for hatching and rearing eggs!
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.
until the egg is ready to hatch. : p
Geese do not get pregant. They lay eggs and sit on a nest.