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 tree frog sinks or drain pipes. Desert tree frog The desert tree frog or little red tree frog ("Litoria rubella") is a tree frog native to Australia, southern New Guinea, and Timor (East Timor and Indonesia). It is one of Australia's most widely distributed frogs, inhabiting northern Australia, including desert regions and much of temperate eastern Australia. It is one of the few Australian tree frogs to inhabit arid, tropical, and temperate climates. It is rotund, with a small, flat head. It has short arms and strong, short legs. Adults are 28–43 mm in snout-vent length. Its ventral surface is white, and