Selous Game Reserve — in Southern Tanzania has 55,000 square kilometers (over 21,000 square miles) of pristine wilderness designated as a UNESCO World Heritage Site since 1982. It has been recognized as an important wildlife sanctuary since 1905. Four game reserves in the area were conjoined in 1922 to form the Selous Reserve, named after an English hunter, naturalist and soldier, who died in action there in 1917. After Tanzanian independence, the reserve was expanded to include elephant migration routes and now boasts arguably having one of the largest elephant populations in Africa. No permanent human settlements are allowed within its boundaries although Tanzania cultural village tour activities are encouraged outside the Selous reserve boundary.
Apart from its massive herds of thousands of elephants and Cape buffaloes, the reserve boasts a varied population of large mammals including huge pods of hippos and prides of lions as well as packs of African wild dogs (Lycaon pictus in Latin) and families of black rhinoceros, both fast disappearing in other parts of East Africa. The greater game reserve wilderness is centered within the 90,000 square kilometers of the Selous ecology which includes other conservation areas, notably Kilombero Game Controlled Area to the west and Mikumi National Park to the north. This is very varied terrain. Disdainful giraffes feed delicately on acacia trees in deciduous miombo woodlands. Herds of wildebeest and antelopes graze on the lightly wooded grasslands north of the majestic Rufiji River, ever alert for prides of lions snoozing in the sun.