Simona Gabriela Kossak (1943 in Krakow, died 2007 in Bialystok) was a Polish biologist, ecologist, and professor of forest sciences. Kossak is known primarily for her efforts to preserve the remnants of natural ecosystems in Poland. Her work dealt with, among other things, the behavioral ecology of mammals. She sometimes referred to herself as a "zoo-psychologist. In 1980, the Scientific Council of the Forest Research Institute awarded Kossak with a doctoral degree in Forest Sciences on the basis of her doctoral dissertation "Research on the tropic situation of roe deer in the habitat of fresh mixed coniferous forest in the Białowieża Primeval Forest" and, in 1991, with a postdoctoral degree in "Forest Sciences" on the basis of her postdoctoral dissertation "Environmental and intraspecific determinants of the feeding behavior of roe deer (Capreolus capreolus L.) in the forest environment" In 1997, she received the academic title of Professor of Forest Sciences. Kossak worked at the Mammal Research Institute of the Polish Academy of Sciences in Białowieża and at the Forest Research Institute at the Department of Natural Forests, where she was the director from January 2003 until her death in 2007. She was also one of the originators of the UOZ-1 repeller, a device that warns wild animals of passing trains. In October 2000, Kossak was awarded the Golden Cross of Merit. She was best known for her uncompromising views about and actions for the protection of nature, especially in the Białowieża Forest, where she lived in the old forester's lodge "Dziedzinka" for over 30 years.