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Give it an extra 4 or 5 days past hatching date. Just like humans sometimes take longer to give birth, so too do bird eggs sometimes become overdue. If they have still not hatched, they're infertile.
the mama bird sits on the eggs to keep them warm
Birds Sit on their eggs to keep them warm, and to hide and protect them from predetors.
the male or female
the chick will die
baby ostriches are born in a shallow hole which their father made in the sand and he sits on the eggs.The mother ostrich lays her eggs in front of the father ostrich then he pushes them under his warm body. He sits on the eggs from late afternoon untill early the next morning the mother sits on the eggs the rest of the day. When the eggs are hatched the parents take turns to look after their young.
Yes, only the hen sits on eggs.
the dang egg will die
it poops, lays eggs, or eats
The bird sits on the eggs and by using heat to keep them warm until they hatch
Both mother and father cause when the father is fiding food the mother sits on the nest and when the mother is finding food for the baby bird or for herself the father sits on them.
Well if you mean when NOT why Then it is WHEN HE SITS ON THE THRONE Hope it Helped (: