Joel Sartore Joel Sartore

National Geographic Photographer and Speaker

Photo: A female yellow-bellied marmot (Marmota flaviventris) at the hibernation study lab of Dr. Greg Florant at Colorado State University.

ANI012-00487

A female yellow-bellied marmot (Marmota flaviventris) at the hibernation study lab of Dr. Greg Florant at Colorado State University.

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