About 15 days.
well if you have a barn swallow egg get a nest with feathers and put it in the sun make shore nothing gets to it.
8-15 Days around i to four thousand years
Barn owl eggs take 31-32 days to hatch.
Until the egg hatches.
17 days for an egg to hatch out
28-34 days from being laid
The golden egg is in the barn
8 months
Three years.
for 20 years
3 years
around 28 days.