He used satellite images to calculate that the average distance between their feeding place and resting place is 3.16 kilometers. "This figure will be an important basis for mapping out the conservation area," he notes.
他根據影像間距再加以推算，算出休息區和攝食區之間的平均活動距離是三．一六公里，「這個數字是將來規畫生態保護區的重要依據」，他說。