Cormorant fishing is a Chinese tradition that goes back more than 1,000 years. The fishermen tie small snares around the cormorants' necks. The bird catches a fish in its beak but can't swallow it, and then returns to the boat, where the fisherman retrieves the catch.
Here is a shot of a fisherman and his trained cormorants resting on his raft. One of my favorite evenings in Guilin, China.