females weigh 16 onuces but 18 ounces during nesting season. males weigh 14 onuces.
at the most 10 years, but in the wild 2-3 years.
The owl's gestation period is 35 days and incubates three eggs. This is done by both the male and female in turns as the other hunts for food.
the average length of a barn owl is 40 cm i hope this answers you problem:)
A barn owl lives for about 10 years in the wild but 12 in captivity.