This rare habitat is home to an even rarer butterfly called Kuafu ’ s hairstreak, the larvae of which will eat nothing but the tender new leaves of Formosan beech.
依附這稀有山毛櫸生存的，則是更稀有的「夸父綠小灰蝶」，因為牠們的幼蟲只吃山毛櫸嫩葉。