参考答案：美国鱼类和野生动物管理局的数据显示，如今，夏威夷93种本土鸟类中有28%已灭绝，另外有1/3已被列入了联邦濒危物种名录中。

解析：[听力原文]
Now 28 percent of Hawaii’s 93 native bird species are extinct and another one-third are listed on the federal threatened and endangered species lists, according to the U. S. Fish and Wildlife Service.