科學圖說

上帝的色彩-三角蜻蜓
(God-Given Colors-Sapphire Flutterer)

三角蜻蜓，兩對翅膀披覆著強烈金屬光澤的藍紫色，是臺灣最美的蜻蜓之一。這隻蜻蜓倒立，筆直地停棲在一片葉子上面，在高溫下，堅挺的身軀，可減少光照面積而進行散熱。觀視倒立隨風搖擺的身軀，把握斜順光得以照耀到翅膀的瞬間，拍攝因光線折射及反射的金屬藍紫色，呈現出力學平衡與光學色彩美感。那是上帝賜予的絕美色彩。

The sapphire flutterer dragonfly (Rhyothemis triangularis) possesses two pairs of wings with patches of intense violet metallic luster. This is one of the most beautiful dragonfly species in Taiwan. This individual was standing straight and upside down on a leaf blade. On hot days, it can reduce its surface area exposed to the sun by staying in an oblique position. Observing this dragonfly swaying in the wind, I captured the moment when light shone on its wings. Due to refraction and reflection of the violet metallic luster, balance between mechanics and esthetics was achieved. These colors are God given.