原级：cormorant
1. Yang has trained cormorants for 36 years and understands the creatures intimately.
2. Fishermen float by on bamboo rafts with their " leashed " cormorants that dive for fish.
3. The cormorants dive, catch a fish in their beaks and bring it back to the boat.
4. Cormorants, swans and other birds are now common sights on the river.