There was a time when during the British raj in India the precious wildlife of India started dwindling due to rampant killings of the wild animals just for the sake of hobby or pastime. On the other side the Indian Rajas and Maharajas were also assuming pride in pulling down the predators like Tigers and Lions. The ever decreasing number of these animals sent an alert to some of the conscious Maharajas and they themselves started putting a ban on hunting and started changing the hunting grounds into reserved national parks where every effort was made to put a break to the fast diminishing of wild animals.
These efforts can be clearly seen in the case of Kanha region which was once a prominent region of gaming sites of the Rajas and Maharajas. In those days both Halon and Banjar valleys were preserved exclusively as hunting grounds for the British. This was the region in which large numbers of barasingha or swamp deers resided. Continuous hunting of these animals started reducing their numbers which was noticed by the authorities who closed the jungles in the year 1931 for hunting purpose. This intelligent and timely move served its purpose and stopped the destruction of the precious wild life of the region. After a period of around three years Kanha valley was declared as a sanctuary spread on a huge area of two hundred fifty sq kms. In the next step the nearby Halon valley was also declared as a sanctuary and was joined with the Kanha valley. But in the race of time supkhar sanctuary was closed down whereas Banjar valley maintained its status of a sanctuary.
Around twenty years later Banjar valley was declared as a National Park and was officially named as Kanha National Park. This formation of Kanha national park is the best example of how hunting grounds of one time are preserving the wildlife of the region and helping in growing the number of wild animals which were on the verge of extinctions