Cormorant fishing is a tradition that dates back hundreds of years in China and Japan, and is also practiced in Macedonia. The cormorants catch fish according to natural instincts and are prevented from swallowing all but the smallest fish by a ring placed around their neck during the fishing. However, the birds are not silly and refuse to catch more fish unless they are rewarded occasionally. The cormorants catch the fish with lightning speed and immediately return to the bamboo raft when their throat is full. Sometimes the fisherman needs to hook them up by the short length of a string attached to one leg for that purpose.