The highlight of the boat trip was the fishermen. At night they sail out onto the lake on a bamboo raft. They have two or three trained cormorants whose necks have a ring around them to prevent them swallowing the fish and they catch the fish for the fisherman and bring the fish to him. They are well trained and respond to his voice commands and whistles, diving into the water and bringing up a large fish and presenting it to the fisherman and repeating the process again and again.