Earlier reports by Americans who came to Taiwan in search of laboratory animals to take the place of rhesus monkeys had also shown that Formosan rock monkey numbers were at a dangerously low ebb. Hence when the law was enacted, the Formosan rock monkey naturally took its place on the list of protected species.
更早之前，美國來台尋覓取代印度恆河猴作為實驗動物的報告，也證實台灣獼猴數量岌岌可危，台灣獼猴遂順理成章進入保育名單。