中文摘要
本項調查時間自民國77年3月至78年2月止共計一年。東埔至八通關步道全長16.3公里，路程甚長，故選擇東埔至乙女瀑布段做蝶類年消長及蝶類相之詳細調查，而乙女瀑布至八通關地區僅做蝶相調查。調查大綱為1.蝶類年消長：年平均值以五至八月出現的蝶種及數量最多，約有70至80種，日平均蝶隻在200隻以上。以十一月至翌年二月出現蝶種及數量最少，每月僅有20餘種，日平均蝶隻在100隻左右。由此可知五月至八月為本區蝶類之盛產期，十一月至二月成蝶無論種類及數量上均明顯消退。2.蝶相部份：本次調查計發現11科166種蝶類，其中48種為東埔至八通關區新記錄種，而34種為玉山國家公園園區內之新記錄種。根據本次調查記錄，並累計前人對本區之原有記錄，東埔至八通關地區所產蝶種應有192種，全園區應有219種（扣除已絕種的大樺斑蝶一種）。而本區之臺灣特有種有20種，佔臺灣特有種總數41%。
英文摘要
A detailed survey of butterflies was conducted for one year from March 1988 to February 1989. The survey was divided into two parts due to the long distance of the studied area between Dongpu and Batongguan, which ran a total of 16.3 km. The survey on the population fluctuation and fauna was conducted in the stretch between Dongpu and Yinu Falls, and the other survey of the butterfly fauna was conducted in the stretch between Yinu Falls and Batongguan. The focus and results of the survey were as follows: Population fluctuation of butterflies: The yearly averages of the number of species and the population of butterflies were the greatest from May to August, with a monthly average of approximately 70 - 80 species and a daily average of approximately over 200 butterflies. The number of species and the population of butterflies were the lowest from November to February of the next year, with a monthly average of 20 species and a daily average of 100 butterflies. The survey on the butterfly fauna indicated that there were 166 species and 11 families, of which 48 were newly recorded species along the stretch between Dongpu and Batongguan, and 34 were newly recorded species in Yushan National Park. A compilation of records from this survey and previous surveys conducted in this study area showed that there were 192 species of butterflies in the area between Dongpu and Batongguan, and 219 species in the entire park (excluding monarch butterfly [Danaus plexippus], which is now extinct in Taiwan). There were 20 endemic species in this area, which was 41% of the total endemic species in Taiwan.
