Orlov's viper images - Joel Sartore

Orlov’s viper (Vipera orlovi) at the St. Louis Zoo.

Orlov’s viper (Vipera orlovi) at the St. Louis Zoo.

Orlov’s viper (Vipera orlovi) at the St. Louis Zoo.

Orlov’s viper (Vipera orlovi) at the St. Louis Zoo.

Orlov’s viper (Vipera orlovi) at the St. Louis Zoo.

Orlov’s viper (Vipera orlovi) at the St. Louis Zoo.

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