common barn owl

Common Barn Owl

Tyto alba


Barn Owls have large round heads with white heart-shaped faces and dark eyes. Their feathers are buff colored above and white below, with black or brown speckles. Their legs are long and featherless.


Barn Owls are slim medium-sized owls, measuring 14-20 inches long with a wingspan of 43-47 inches. Barn Owls weigh 1-2 pounds.



Mice, gophers, voles, shrews, small birds, insects, fish and crustaceans make up the diet of the wild Barn Owl. At Cosley Zoo, the Barn Owls receive quail, rats, and mice.


Barn Owls mate for life. Females lay a clutch of 3-6 eggs. The eggs are laid one at a time every few days over two or three weeks. Since each egg needs to incubate for 32-34 days before hatching, the hatching of the eggs is also spread out over a 2 or 3-week interval. At about 3 weeks of age, the owlets are able to eat by themselves the food their parents provide. By two months of age, the young are completely independent. Barn Owls raise 2-3 broods per year.

Shelter and Space Needs

The Barn Owl can be found in trees, abandoned burrows and buildings, and old farm machinery left in fields. Its preferred habitat is temperate forests and grasslands. Barn Owls hunt at night in open areas and fields and cover a large area, sometimes flying up to 3 miles looking for food.

Life Expectancy

In the wild, Barn Owls have an average life expectancy of two years. In captivity, they can live to be 15-18 years old.

Importance to Man

Barn Owls are at the top of the food chain and are considered important components of the ecosystem. They control the pest populations of small animals, such as mice. The Barn Owl is currently on the Illinois Endangered Species List due to the decline of its food supply and available nesting sites.

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