Japanese field voles can seriously impact the profits of apple orchard owners, if left unchecked. For centuries, many farmers have relied on owls to keep vole numbers to manageable levels, and research has shown the night predators to be incredibly efficient.
Ural owls have been setting up their nests in orchards with high rodent populations for a very long time, but Japanese apple growers were the first to notice the beneficial effect the winged predators had on their orchards and actively try to use them as a means of natural pest controls. Apart from allowing the owls to set up nests in tree hollows, they also started installing man-made tree houses to encourage owls from settling on their properties. They soon noticed that the owls brought the vole population down significantly, which meant healthier trees and bigger profits.
