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Tracking penguins

A Magellanic adult penguin with three chicks. The adult penguin is wearing a satellite tag (look for the antenna sticking up).The transmitter is attached with epoxy and special tape. The tags are about the size of many cell phones and weigh less than 3.5 ounces. Scientists tagged the penguins to follow the birds' migration south to the breeding colonies. The work is part of a larger effort to better understand penguin biology, with an aim of protecting the charismatic creatures. Credit: Courtesy of Dee Boersma, The Penguin Sentinels

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