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.
Barn swallow eggs typically hatch in about 14-16 days after they are laid. The incubation period is primarily carried out by the female barn swallow.
Barn owl eggs take 31-32 days to hatch.
Until the egg hatches.
17 days for an egg to hatch out
The golden egg is in the barn
Three years.
8 months
3 years
A Barn owl egg typically measures around 45-50 mm in length.
they stay in there egg for 3-5 days
An egg? Though not to snakes who swallow them whole.