Nature: Butterflies and Moths

Great Purple Hairstreak 细尾青小灰蝶 (Family Lycaenidae, Coppers, Blues and Hairstreaks)

Suddenly you are aware of something strange on a nearby leaf, colors pulsating and changing in iridescent, metallic flashes like the flickering flames of copper sulfate. You are fortunate to be looking at a Great Purple Hairstreak, the possessor of the most wonderful color changes of any butterfly in America. One moment you see iridescent bluish-green, then royal purple, aquamarine blue, glints of violet and metallic green. This is because the butterfly is slowly moving its wings and each change in the angle of the sun hitting the prism-like cells of the wings creates a new symphony of wondrous color.

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