Slightly higher rainfall in the adjacent hill country permits more trees to grow. Savannas are inhabited by browsing animals such as the prehensile-lipped black rhinoceros, impala and kudu. In September, with the returning rains, the huge herds of wildebeest, gazelle and zebra disperse again into the plains. The lion, potential enemy of all herdsmen, preys on the cattle of the Masai. Protected only by their thick buffalo hide shields, the Masai warriors kill lions with long spears and short defensive swords.
Much prestige attends the successful hunter, especially the one who throws the first spear.
Abundant rainfall in the mountains encourages rain forest growth on lower slopes while at higher elevations nearly pure stands of bamboo thrive. The salt lick has attracted the elephant, the bongo and other small animals to this spot.