The wildlife Authority Agency of North Sumatra (BBKSDA Sumut) got information about an illegal hunt activity of Sambar deer (Rusa Unicolor) occured around Dolok Sibual-buali Nature Reserve. A day after that, on the 06th of June 2020, two Wildlife Rangers from Scropion Foundation and three forestry policeman from The wildlife Authority carry out a joint patrol mission to ensure that information, and also to monitor and preventing poacher to captured Tapanuli orangutans in this area.