The institute discovered that a Formosan wild boar had invaded the stockades. An investigation showed less-than-reassuring results: some newborn piglets had noticeable brown and black stripes on their bodies, apparently the descendants of a Lanyu miniature pig and a Formosan wild boar.
所方曾經發現一頭意外入侵的山豬，清點之後察覺不妙，有些新生的小豬身上長出極為明顯的棕、黑條紋外觀，疑似蘭嶼豬與山豬所生的後代。