California vineyards installed more than 500 owl boxes; fields with more barn owls had up to 52% fewer rodents without using additional poison

• Barn owls help vineyards control rodents naturally.
• Barn owls can help vineyards reduce rodent damage in a natural way, by making rodents more cautious, and reducing their activity in vineyards, according to a new study from researchers in California.
• The study was focused on vineyards in Napa Valley, California, where rodents damage grapevines during the growing season.