Barn owl eggs hatch in 29 to 35 days, and the owlets begin flying after about two months. Young barn owls live in the cavities where their parents nest. The adult owls don't usually build nests but may use nest boxes or the abandoned nests of other birds.
Barn owls are the only members of their family, Tytonidae. Unlike the typical owls of the family Strigidae, many of which are crepuscular or diurnal, they are strictly nocturnal. They are easy to identify because of their distinctive heart-shaped faces, small eyes and short tails. Barn owls are one of the widest-ranging land birds and live on all the continents except Australia. They live on rodents and other small animals and benefit people by keeping rodent populations under control.