Lai Jung-hsiao says that in the late 1970s there were perhaps 30 or even as many as 50 of these impressive dark birds coming out to hunt for food, but they had completely disappeared by the late 1980s.
賴榮孝說，民國 60 年代後期，五股沼澤曾有三、五十隻黑黝黝、雄赳赳的黑鳶出沒覓食，70 年代後期已完全消失。