How much habitat do Barn Owls need in mixed landscapes?
Research funded by BOT has produced the best estimates of the quantity of habitat required by British Barn Owls in different landscape types. In mixed landscapes, we estimate that Barn Owls require about 43 km of grassy margin within 2 km of a suitable nest site. Research has also shown that field voles require grassy margins to be greater than 4 m, and ideally around 6 m wide. Barn Owls also hunt most efficiently along 6 m wide margins. We therefore estimate that Barn Owls in mixed landscapes require between 17 and 26 ha of rough grassland within 2 km of a nest site. However, to support a viable breeding population of Barn Owls over a wider area, land beyond 2 km radius also needs to be suitable. We estimate that between 1.4 and 2.0% of the total land area in mixed landscapes needs to be rough grassland. Perhaps by working with your neighbours you can make Barn Owls a common sight in your area?
