臺灣外來鳳頭鸚鵡（Cacatua屬）野外族群現況

Status of Feral Populations of Exotic Cockatoos (Genus Cacatua) in Taiwan

依據中華民國野鳥學會鳥類資料庫1986-2000年及本研究1998-2000年的野外評估調查，在臺灣已有4種鸚鵡科（Psittacidae）外來鳳頭鸚鵡屬（Cacatua）鳥種的野外族群出現。其中，戈芬氏鳳頭鸚鵡（C. goffini）及葵花鳳頭鸚鵡（C. galerita）較為常見。白鳳頭鸚鵡（C. alba）及小葵花鳳頭鸚鵡（C. sulphurea）的數量則仍稀少。鳳頭鸚鵡以單獨或小群出現於臺灣西部的都會區附近，夜間棲息的地點固定並曾發現2~3種鳳頭鸚鵡棲息在一起。鳳頭鸚鵡的族群數量在引入後，並無明顯增加的趨勢。整體而言，外來鳳頭鸚鵡並未成功入侵臺灣。

Based on the database of 1986-2000 provided by the Wild Bird Federation Taiwan and a field assessment survey conducted between 1998 and 2000, four exotic species of cockatoos, belonging to the genus Cacatua (Psittacidae), were found in Taiwan. The Goffin’s Cockatoo (C. goffini) and the Sulphur-crested Cockatoo (C. galerita) are more common than the White Cockatoo (C. alba) and the Lesser Sulphur-crested Cockatoo (C. sulphurea). Most of the sightings were in single or small flocks occurring in or near metropolitan areas of western Taiwan. The birds built permanent roosting sites that were occupied by one to three species. The feral populations of the cockatoos in Taiwan have remained low but fairly stable, since they were introduced more than 20 years ago. Overall, they are not successful invaders.