Thar desert
It lies mostly in the Indian state of Rajasthan. The Thar Desert is bounded on the northwest by the Sutlej River, on the east by the Aravalli Range, on the south by the salt marsh known as the Rann of Kutch (parts of which are sometimes included in the Thar), and on the west by the Indus River. There are three principal landforms in the desert region — the predominantly sand covered Thar, the plains with hills including the central dune free country and the semi-arid area surrounding the Aravalli range.
The Desert National Park, Jaisalmer, spread over an area of 3162 km˛, is an excellent example of the ecosystem of the Thar Desert. Great Indian Bustard, Blackbuck, chinkara, desert fox, Bengal fox, wolf, desert cat etc. can be easily seen here. Tal Chhapar Sanctuary is a very small sanctuary in Churu District, 210 km from Jaipur, in the Shekhawati region. This sanctuary is home to a large population of graceful Blackbuck. The Jalore Wildlife Sanctuary in Jalore district (130 km from Jodhpur) is another small sanctuary that is privately owned where a sizeable population of rare and endangered wildlife is present including the Wildcat.
Kutch desert
The Rann of Kutch is a seasonally marshy saline clay desert located in the Thar Desert biogeographic province in the state of Gujarat. Kutch is the name of the district wherein it is situated.
In India's summer monsoon, the flat desert of salty clay and mudflats, averaging 15 meters above sea level, fill with standing waters, interspersed with sandy islets of thorny scrub, breeding grounds for some of the largest flocks of Greater and Lesser flamingoes
The Rann is also famous for the Indian Wild Ass sanctuary, the Little Rann of Kutch, where the last of three species of Asiatic Wild Ass (Equus hemionus khur or khar), the only ones in Asia, still exists along with wolves, foxes, jackals, chinkara gazelles, nilgai antelope and blackbucks. The Rann of Kutch is also the only place in Pakistan and India which plays host to migrating flamingoes. There are 13 species of lark in the Rann of Kutch.
