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Spider tortoise (Pyxis arachnoides brygooi) at the St. Louis Zoo.

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Nikolsky’s viper (Vipera nikolskii) at the St. Louis Zoo.

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Nikolsky’s viper (Vipera nikolskii) at the St. Louis Zoo.

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Nikolsky’s viper (Vipera nikolskii) at the St. Louis Zoo.

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Nikolsky’s viper (Vipera nikolskii) at the St. Louis Zoo.

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Nikolsky’s viper (Vipera nikolskii) at the St. Louis Zoo.

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Nikolsky’s viper (Vipera nikolskii) at the St. Louis Zoo.

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Nikolsky’s viper (Vipera nikolskii) at the St. Louis Zoo.

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Armenian viper (Montivipera raddei) at the St. Louis Zoo.

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An endangered Hermon Mountain viper (Vipera bornmuelleri) at the St. Louis Zoo.

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An endangered Hermon Mountain viper (Vipera bornmuelleri) at the St. Louis Zoo.

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An endangered Hermon Mountain viper (Vipera bornmuelleri) at the St. Louis Zoo.

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An endangered Hermon Mountain viper (Vipera bornmuelleri) at the St. Louis Zoo.

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An endangered Hermon Mountain viper (Vipera bornmuelleri) at the St. Louis Zoo.

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An endangered Hermon Mountain viper (Vipera bornmuelleri) at the St. Louis Zoo.

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Armenian viper (Montivipera raddei) at the St. Louis Zoo.

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Armenian viper (Montivipera raddei) at the St. Louis Zoo.

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Armenian viper (Montivipera raddei) at the St. Louis Zoo.

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Armenian viper (Montivipera raddei) at the St. Louis Zoo.

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Armenian viper (Montivipera raddei) at the St. Louis Zoo.

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Ocellate mountain viper (Montivipera wagneri) at the St. Louis Zoo.

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Ocellate mountain viper (Montivipera wagneri) at the St. Louis Zoo.

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Ocellate mountain viper (Montivipera wagneri) at the St. Louis Zoo.

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A harlequin frog (Atelopes varius) at the Omaha Zoo. This species, from Panama, is now thought to be extinct in the wild. With only 300 or so in captivity, it is thought to be one of the rarest amphibians in the world.

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A critically endangered harlequin frog (Atelopes varius) at the Omaha Zoo. This species, from Panama, is now thought to be extinct in the wild. With only 300 or so in captivity, it is thought to be one of the rarest amphibians in the world.

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A critically endangered harlequin frog (Atelopes varius) at the Omaha Zoo. This species, from Panama, is now thought to be extinct in the wild. With only 300 or so in captivity, it is thought to be one of the rarest amphibians in the world.

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A critically endangered harlequin frog (Atelopes varius) at the Omaha Zoo. This species, from Panama, is now thought to be extinct in the wild. With only 300 or so in captivity, it is thought to be one of the rarest amphibians in the world.

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A critically endangered harlequin frog (Atelopes varius) at the Omaha Zoo. This species, from Panama, is now thought to be extinct in the wild. With only 300 or so in captivity, it is thought to be one of the rarest amphibians in the world.

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A critically endangered harlequin frog (Atelopes varius) at Omaha’s Henry Doorly Zoo. This species, from Panama, is now thought to be extinct in the wild. With only 300 or so in captivity, it is thought to be one of the rarest amphibians in the world.

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A critically endangered harlequin frog (Atelopes varius) at the Omaha Zoo. This species, from Panama, is now thought to be extinct in the wild. With only 300 or so in captivity, it is thought to be one of the rarest amphibians in the world.

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

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