The first macaque to master this task was Aurora, an elegant female who clearly enjoyed showing off that she could hit the target more than 90 percent of the time.

• 最快精通这项工作的猕猴名叫奥萝拉，是一只优雅的雌猴，她对于能够有超过90%25的成功命中率，显然乐在其中。