Thar Desert natural vegetation of this dry area is classed as Northwestern thorn scrub forest occurring in small clumps scattered more or less openly. Density and size of patches increase from west to east following the increase in rainfall. The natural vegetation of the Thar Desert is composed of the following tree, shrub and herb species: The endemic floral species include "Calligonum polygonoides", "Prosopis cineraria", "Acacia nilotica", "Tamarix aphylla", "Cenchrus biflorus". The Thar Desert is the most widely populated desert in the world, with a population density of 83 people per km. In India, the inhabitants comprise Hindus, Muslims, and Sikhs. In
Indus Valley Desert Indian wolf, striped hyena, caracal, Indian leopard and the urial ("Ovis orientalis punjabensis") along with many rodents and other mammals. Meanwhile, the 190 species of bird in the desert include the red-necked falcon. Like the nearby Thar Desert the Indus Valley desert has little farming or grazing due to its hard climate and therefore the natural habitats are almost intact. However hunting still goes on and is a threat to caracals, wolves and other mammals. Indus Valley Desert The Indus Valley Desert is an almost uninhabited desert ecoregion of northern Pakistan. The Indus Valley desert covers an area of in