In the Kenting National Park on the Hengchun Peninsula at Taiwan's southern tip, about once every five years dense swarms of larvae of the common mormon butterfly (Papilio polytes pasikrates) cover Clausena excavata trees (which belong to the family Rutaceae, the citrus family).
至於南部恆春墾丁國家公園內，平均五年，玉帶鳳蝶即密密麻麻爬滿芸香科植物「過山香」上，互相推擠間，不斷有幼蟲由樹上紛紛墜落。