The forest areas primarily concerned are the forest reserves of Tanganyika. Game animals have inhabited these forest areas, and other wilderness areas of the territory, for many thousands of years. Relatively recently the adoption of settled forms of land use has caused a big reduction in the extent of wilderness, and a corresponding rise in the importance, as holding grounds for game, of the forest areas. Some forest reserves have been also game reserves since their original establishment. This dual use has been largely successful but has also created problems which will tend to become more severe. Study of the questions involved is in its early stages. The matter is, however, not simply one of concern for game and forestry. Owners of domestic stock wish their animals to use forest grazing in competition with and as an alternative to game. The purpose of this paper is to determine how far the welcome granted by forestry to the wild fauna needs to be qualified in the interest of the territory as a whole.