Yeh's book Waterside Sprites is a dragonfly photo book aimed at middle school students. Dragonfly nymphs spend their entire lives under water. When the adult insects lay their eggs in autumn or winter, they glue them to the river or pond bed. In terms of appearance, the nymphs which later hatch really are "ugly ducklings," with mud-brown bodies and coarse contours.
俗稱「水蠆」的蜻蜓稚蟲終其一生躲藏水中，成蟲在秋冬產卵後，靠著卵上的膠質附著水底，孵化的水蠆，土黃色的身體、粗硬的線條，論外型，活脫是隻「醜小鴨」。