Acknowledgments
We thank producers in Champaign County, Illinois, especially Sue Smith, for access to their fields and invaluable information on bat roosts and agricultural practices. K. Estes (Illinois Natural History Survey) kindly provided data on local crop pest abundance. We thank K. Funderburg and E. Weber for field assistance. L. Hunninck was supported in part by the U.S. Geological Survey (G20AC00349). This research was funded by the USDA National Institute of Food and Agriculture, Hatch project (ILLU-875-982).