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
Desert National Park is one of the last sites in which this species can be found in good numbers. As such, the species draws in thousands of birdwatchers from all over the world. In addition to the great Indian bustard, the park supports a variety of other birds of interest to birdwatchers and conservationists alike. The Thar Desert, often called an 'ocean of sand', covers a large area of western Rajasthan. The fragile ecosystem of the Thar supports a unique and varied wildlife. In this vast ocean of sands lies the famous Desert National Park, which provides an excellent example of the ecosystem