Rudolph “Rudy” Francis Dorner, 82, of St. Charles, passed away Sunday, May 29, in Geneva. Dorner graduated from the University of Illinois with a degree of forestry. He was passionate about the outdoors and caring for nature. He was employed for many years at Fermilab as emergency coordinator. He will be remembered by many as the “Bison Boss” as he was instrumental in caring for and maintaining the bison at the lab.