With the disappearance of wildlife outside the game reserves and National parks of East Africa it is becoming increasingly evident that these last pockets of nature are not in a state of stable equilibrium. Erosion due to overgrazing by hippopotamuses at Queen Elizabeth and the necessity of culling this species there offers an impressive example of this instability that can be rectified by human interference. Widespread destruction of woodland by elephant in various parts of East Africa poses another challenging problem. As there is no longer any place for game outside the sanctuaries, Murchison Falls Park has too many elephants in too small an area. Woodland in particular suffers until in fact no woodland will be left and no species of animal such as giraffe to name only one, which relies on woodland for their existence will survive.