The AWWIC (American Wind Wildlife Information Center) database is the most comprehensive database of post-construction fatality monitoring data from U.S. wind projects, incorporating both publicly available and contributed data. The 2nd edition REWI Technical Report, Summary of Bat Fatality Monitoring Data Contained in AWWIC, summarizes bat fatality rate and fatality incident data from wind energy facilities in the U.S. and ensures the most up-to-date fatality data are available for generating hypotheses about bat collision risk at wind energy facilities.