Yeh Wen-chi emphasizes that the natural history of each dragonfly species is unique, and it is hard to generalize. For instance, the protected giant spiketail only breeds once in three years. It does not fit the general pattern of insects which live fleeting lives and may produce several generations a year.
葉文琪強調，每種蜻蜓的生態其實都很獨特，很難一以言之，比如被農委會列入保育類的「無霸勾蜓」，三年才繁殖一代，並不符合昆蟲朝生暮死、一年傳宗接代多次的特性。