Oak Trees Offer Important Bat Habitat in Vineyards

A study by scientists with University of Washington, University of California Cooperative Extension, and the U.S. Forest Service demonstrated that California vineyards with large oak trees had greater bat foraging activity, helping to provide natural insect pest control. In a study of 14 vineyards, bat foraging activity was 1.5 times greater at trees compared to open, treeless areas. Furthermore, bigger trees attracted more bats, and the vineyards with trees had more species of insect-eating bats than other vineyards did. “We hope the study will increase awareness of these beautiful and beneficial trees and make the case for conservation and restoration,” said co-author Bill Tietje.