Big-headed Turtle images - Joel Sartore

Photo: A critically endangered Madagascar big-headed turtle (Erymnochelys madagascariensis) at the Houston Zoo.

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A critically endangered Madagascar big-headed turtle (Erymnochelys madagascariensis) at the Houston Zoo.

Photo: A critically endangered Madagascar big-headed turtle (Erymnochelys madagascariensis) at the Houston Zoo.

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A critically endangered Madagascar big-headed turtle (Erymnochelys madagascariensis) at the Houston Zoo.

Picture of an endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

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An endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

Picture of an endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

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An endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

Picture of an endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

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An endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

Picture of an endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

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An endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

Picture of an endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

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An endangered big-headed turtle (Platysternon megacephalum megacephalum) at the National Mississippi River Museum and Aquarium in Dubuque, Iowa.

Video-taping a critically endangered Madagascar big-headed turtle (Erymnochelys madagascariensis) at the Houston Zoo.

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Video-taping a critically endangered Madagascar big-headed turtle (Erymnochelys madagascariensis) at the Houston Zoo.

A critically endangered Madagascar big-headed turtle (Erymnochelys madagascariensis) at the Houston Zoo.

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A critically endangered Madagascar big-headed turtle (Erymnochelys madagascariensis) at the Houston Zoo.

Photo: A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

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A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

Photo: A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

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A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

Photo: A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

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A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

Photo: A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

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A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

Photo: A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

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A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

Photo: A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

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A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

Photo: A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

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A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

Photo: A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

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A big-headed turtle (Platysternon megacephalum shiui) from Asia at the Sedgwick County Zoo.

Photo: Julie Jensen Director of Marketing | WVC O: 866.800.7326 | D: 702.443.9249 | E: j.jensen@wvc.org

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