Ark of the Waterhole. A dramatic 24-hour day-night sound portrait of events at a waterhole in Kenya. Wildebeests and colobus monkeys join a hammerkop (bird) as the sun rises above the horizon and heats the forest surrounding this main source of African life. Then a downpour cools the air. Later, mating crested cranes, elephants, masked weaver birds, lions, a giant forest pig, hippos, and a funny-sounding chorus of tree hyrax all lend their wonderful voices to this natural performance. by [nature sounds]