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Riverbank Butterflies
Photo: Green butterflies on a sandy riverbank
WALLPAPER

Leaf-green pierid butterflies alight on the sandy shores of the Tuichi River in Bolivia's Madidi National Park. The vast Madidi wilderness encompasses a staggering range of ecosystems—from snowcapped Andean peaks to tropical Amazonian lowlands.

Photograph by Joel Sartore

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Long Exposures

When making long exposures, use a remote release to avoid camera movement. If you don't have a remote release, use the camera's self-timer.

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