This webinar, which was originally presented on Tuesday, November 17, 2020, features Dr. Anthony DeNicola, President of White Buffalo, Inc., presenting data on his six surgical sterilization sites with open populations (not fenced or island environments) in California, Maryland, Michigan, Ohio, Virginia, and New York. From 2012 to 2020, Dr. DeNicola and his team sterilized 493 deer via tubal ligation and ovariectomy. They noted an average reduction in deer abundance of 25% from Year 1 to Year 2. At research sites with 4 years of sterilization treatment (4 sites), they noted an average total reduction of 45%. His results demonstrate that significant reductions in local deer densities using high percentage surgical sterilization programs can be achieved. In this webinar Dr. DeNicola also provides details on long-term program maintenance strategies using local volunteers.