The Sumatran jungle is noisy today. There are hoots and squawks, peeps and howls. All of the animals are being so loud. The birds, frogs and gibbons are in the trees and the streams, enjoying the sound of their own voices. But Graham the orangutan is not enjoying all of the noise because he is hungry and tired. He has spent the morning swinging through the treetops, and he just wants to go home for a snack and a sleep. He is getting grumpy because all of his jungle friends are being so noi...