Fan Yi-pin, who often collects moth specimens at Fushan in Ilan County, has watched sparrows eating that great enemy of beefwood trees, the casuarina moth. "The sparrows pull off the moths 'wings and eat their plump abdomens." Fan's description may sound grisly, but it highlights the moths' indispensable ecological role.
常在宜蘭福山採集飛蛾的范義彬，看過麻雀捕食木麻黃大敵﹘﹘黑角舞蛾，「麻雀將蛾的翅膀拉掉，吃它胖胖的肚子」，范義彬的形容聽來殘忍，卻是蛾類在生態裡不可或缺的角色。