The Sudans Nile within the Sudans has no significant tributaries. The amount of rainfall increases towards the south. In the north there is the very dry Nubian Desert; in the south there are swamps and rainforest. The Sudans’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 the sun. In the northern and western semi-desert areas, people rely on the scant rainfall for basic agriculture and many are nomadic, travelling with their
Desert rainbow-skink Desert rainbow-skink The desert rainbow-skink ("Carlia triacantha") is an Australian skink in the genus "Carlia", commonly known as four-fingered skinks, from the subfamily Lygosominae. It is native to desert woodland regions throughout most of the Northern Territory, the north of Western Australia, and the far north-west of South Australia. It was originally classified as "Leiolopisma triacantha", and is sometimes known as the three-spined rainbow-skink. The desert rainbow-skink is on average long, excluding the tail. It is characterised by three keels or spines on the dorsal scales. It is typically a mid-brown to grey-brown colour with less pigmentation on the ventral