Herpetologist Vasily Kokenko holds viper venom after drying at the Siberian Serpentarium.

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Viper in a holding pen at the Siberian Serpentarium.

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Herpetologist with the Siberian Serpentarium Alexander Pisarev shows a green rattlesnake.

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Herpetologist Vasily Kokenko holds a viper at the Siberian Serpentarium.

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Herpetologist Vasily Kokenko holds a viper at the Siberian Serpentarium.

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Siberian Serpentarium staff member holds dried venom from vipers.

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Herpetologist Vasily Kokenko holds a viper at the Siberian Serpentarium.

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Herpetologist Alexander Pisarev extracting venom from a viper at the Siberian Serpentarium.

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Herpetologist Alexander Pisarev extracting venom from a viper at the Siberian Serpentarium.

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Herpetologist Alexander Pisarev disinfects a viper's mouth after extracting her venom at the Siberian Serpentarium.

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Herpetologist Alexander Pisarev extracting venom from a viper at the Siberian Serpentarium.

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