Nature: Butterflies and Moths

Green Page Moth 绿页蛾 (Family Uranidae, the Green Migrators)

In Central America some day you might look up into the blue and see what looks like a great black snake stretching from one end of the sky to the other. You might even see the “snake” slithering from side to side like a real snake dose on the ground, but if you looked at it through your field glasses or a telescope you would see that it was made up of thousands upon thousands of green, tailed moths all determinedly flying from northwest to southeast. Sometimes the great snake appears to drop parts of itself down from the sky and then, if you are in the right place, you see what looks like a river of dark green moths flowing over the surface of the land. Swiftly they rush by you  – day flying moths driven on and on by a frenzy of migration.

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