• Western barn owls in captivity can live up to 18 years. This significantly exceeds their lifespan in the wild.

The Ural owl is a species with a typical lifespan of from 15 to 25 years, and a maximum of 34 years, with a theoretical lifespan of from 15 years 2 months to 21 years 8 months. Development begins with the "Embryo" stage, when it develops inside an egg and receives nourishment from the yolk. The chick's eyes open at an age of from 1 week 3 days to 1 week 5 days, after which comes the "Chick" stage, when the species is covered in white down, parents feed it captured rodents, it grows rapidly and learns to stand, and the duration of this stage is from 1 day to 2 months. Then comes the "Adult" stage, which lasts from 2 months to 20 years, when the species is capable of reproducing and hunting independently, possessing good eyesight and very accurate hearing. The age of sexual maturity in the species occurs at from 9 months 1 week to 1 year 3 months.