Barn owl
| Barn Owl | |
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| Species: | T. alba
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| Tyto alba | |
The Barn Owl (Tyto alba) is an owl in the barn owl family Tytonidae. This is one of the two groups of owls, the other being the typical owls Strigidae. (Any member of the family Tytonidae is sometimes referred to as a Barn Owl.)
These are pale, long-winged, long-legged owls, 33-39 cm in length with an 80-95 cm wingspan. They have an effortless wavering flight as they quarter pastures or similar hunting grounds.
There are a number of races differing in underpart colour. For example, T. a. alba of western Europe is almost pure white below, but T.a. guttata of central Europe is orange. All races have grey and ochre upperparts.
These are birds of open country such as farmland, preferentially hunting along the edges of woods. They are fairly sedentary and nocturnal or crepuscular.
Barn Owls occur worldwide, on every continent except Antarctica. Sometimes they are called monkey-faced owls because of their appearance. Other common names are church owl, golden owl, rat owl, and stone owl.
Barn Owls feed on voles, frogs and insects, but are economically valuable birds as they also prey on animal pests like rats, shrews, moles and mice.
Other than human persecution, they have few predators, although large owls such as the Eurasian Eagle Owl and the Great Horned Owl will kill smaller species if the opportunity arises. Farmers often encourage Barn Owl habitations for rodent control by providing nest sites such a wooden nest box or a large drum installed sideways in a barn. An adult Barn Owl will eat approximately 3 mice per day. A pair raising 3-5 owlets will consume many more rodents.
Barn Owls have a notable shreee scream, ear-shattering at close range. They also hiss like steam kettles. When captured or cornered, they throw themselves on their backs and flail with sharp-taloned feet, an effective defence. Unlike popular belief, they do not make the call "tu-whit to-whoo".
Video Links
- Barn Owl videos at the Internet Bird Collection website
References
- Researchers uncover the neural details of how Barn Owls locate sound sources (Cover Story) by Charles Day. Physics Today June 2001 v54 i6 p20
- How now, barn owl by David Tipling, New Scientist, 1/14/95, Vol. 145 Issue 1960, p43
- Barn Owls: Predator-Prey Relationships and Conservation by Iain Taylor, ISBN 052139290X, Cambridge University Press, 1994
External links
