The value of communal wildlife conservancies toward biodiversity maintenance cannot be ignored. Wildlife conservancies promote biodiversity in numerous ways. By protecting the primary animals of economic value, the animals and plants that support or depend on the primary animals are also protected, and the majority of the land remains in a natural state. A 2002 paper found that a game reserve in Tanzania (in a comparable situation to the conservancies in Namibia) was unsustainable for several reasons. The central government of Tanzania has set aside a large portion of land for the conservation and controlled hunting of game in the Kilombero river valley. The findings in the paper indicate that in areas of the reserve that were patrolled by national wildlife agents, game was relatively plentiful. However, the majority of the reserve was poorly patrolled, leaving game animals over-harvested and significantly stressed by poaching and agricultural activity. Poaching mostly occurred to supply meat to supplement local people’s diets, but a significant number of rhinoceros and elephant were taken by trophy hunters. The problem is compounded if the rules were enforced since that would prevent the locals access to quality protein from their hunting activities. Because the patrol of large areas by government wildlife agents is not possible due mostly to monetary issues, the poaching continues and the population of wildlife declines.