12. October 201716. January 2018 conservation, media-echo Species protection at the front door: the ringed snakes and Duisburg Zoo Exclusive for zoos.media – 15.02.2017. Author: Philipp J. Kroiß Duisburg zoo is actively supporting the survival of the ringed snakes in the ruhr area in the west of Germany with breeding, reintroduction and education. » more