Fauna of South Africa the world’s seventeen megadiverse countries. In the extreme northwest of the country is true desert, which is the southernmost end of the Namib desert, a desert that is at least 55 million years old, making it the oldest desert in the world. This arid corner intergrades into the extensive semi-arid Karoo found across much of South Africa, covering the Northern Cape and into parts of the Western Cape, Eastern Cape and the Free State. This biome used to be extensive grassland in the past, but has become dominated by small shrubs and succulents due to centuries of overgrazing. To the
Kazakh semi-desert in livestock numbers in Kazakhstan is allowing the native plants a greater opportunity to regenerate. The Kazakh semi-desert is an ecotone between the Kazakh Steppe to the north and the Central Asian northern desert to the south, running in a band across central Kazakhstan. The climate here is semi-arid and highly continental. Precipitation averages between and annually. Mean temperatures in January range from and , while July means are between and . Annual average temperatures are around . The region's topography consists of vast, flat plains and salt flats broken by dissected plateaus (known locally as ""melkosopochniki""). As a transition