Cormorant fishing on China's Li River is all but dying out.

Fisherman set out with domesticated cormorants, a seabird, on bamboo rafts before sunrise and often in the early evening. These birds prey on fish. But the fishermen tie threads around the necks of the cormorants to prevent them from swallowing the fish they catch.

Once the threads are set, the fishermen begin chanting on their boats to prompt the birds to dive down and retrieve the fish. They control their birds with long poles.

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