Butterfly Chasers (IMAGE)

Smithsonian Tropical Research Institute

Butterfly Chasers

Caption

Bob Srygley (driving) and field assistants track sulphur butterflies as they migrate across the Panama Canal. Peak migrations correspond to El Niño, a global climate pattern.

Credit

Christian Ziegler

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Credit: Christian Ziegler for high resolution images, contact zieglerphoto@yahoo.de

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