Guiana Shield is equally rich and 13,367 species of vascular plants have been found, approximately 40% of which is considered endemic. The shield is overlain by the largest expanse of tropical forest on any Precambrian shield area in the world. Guianan rain forest is similar in nature to Amazonian rain forest and known protected areas include the Iwokrama Forest of central Guyana, Kaieteur, Kanuku National Park of southern Guyana, the UNESCO World Heritage Site Central Suriname Nature Reserve of Suriname, the Guiana Amazonian Park in French Guiana and the Tumucumaque National Park in the Amapá State of Brazil. In Venezuela the forests
Foreign relations of Suriname World Bank, and the International Monetary Fund. Suriname became a member of the Islamic Development Bank in 1998, under the Wijdenbosch government. In 2003, Suriname joined the Nederlandse Taalunie (Dutch Language union). Bilateral agreements with several countries of the region, covering diverse areas of cooperation, have underscored the government's interest in strengthening regional ties. The return to Suriname from French Guiana of about 8,000 refugees of the 1986–91 civil war between the military and domestic insurgents has improved relations with French authorities. Longstanding border disputes with Guyana and French Guiana remain unresolved. Negotiations with the Government of Guyana brokered by