Sudan copper, gold, granite, gypsum, iron, kaolin, lead, manganese, mica, natural gas, nickel, petroleum, silver, tin, uranium and zinc. The amount of rainfall increases towards the south. The central and the northern part have extremely dry desert areas such as the Nubian Desert to the northeast and the Bayuda Desert to the east; in the south there are swamps and rainforest. Sudan's rainy season lasts for about three months (July to September) in the north, and up to six months (June to November) in the south. The dry regions are plagued by sandstorms, known as haboob, which can completely block out
Desert bighorn sheep and Wildlife Service to propose a reduction in protected sheep habitat by more than 50%, from . Desert bighorn sheep Desert bighorn sheep ("Ovis canadensis nelsoni") is a subspecies of bighorn sheep ("Ovis canadensis") that is native to the deserts of the USA's intermountain west and southwestern regions, as well as northwestern Mexico. The trinomial of this species commemorates the American naturalist Edward William Nelson (1855–1934). The characteristics and behavior of desert bighorn sheep generally follow those of other bighorn sheep, except for adaptation to the lack of water in the desert. They can go for extended periods of time