黑天鹅 (黑天鵝) hēi tiāné
          
              hēi tiāné 
              
              noun 
              black swan 
              Domain: Modern Chinese 现代汉语
              
                , Subdomain: Zoology 
              
              
                , Concept: Bird 鸟
              
              
              
                Notes: Species: Cygnus atratus (Wikipedia '黑天鹅')