Undated picture ofthe only remaining Dendroseris gigantea on Robinson Crusoe Island. Invasive species are crowding out the unique native plants and birds that evolved during more than a million years of isolation before the first people moved into the Juan Fernandez archipelago, composed of three remote islands; Robinson Crusoe, Alejandro Selkirk and Santa Clara, about 416 miles (670 kilometers) west of the Chilean mainland. (AP Photo/Hugo Arnal)

Associated Press
Undated picture ofthe only remaining Dendroseris gigantea on Robinson Crusoe Island. Invasive species are crowding out the unique native plants and birds that evolved during more than a million years of isolation before the first people moved into the Juan Fernandez archipelago, composed of three remote islands; Robinson Crusoe, Alejandro Selkirk and Santa Clara, about 416 miles (670 kilometers) west of the Chilean mainland. (AP Photo/Hugo Arnal)
Undated picture ofthe only remaining Dendroseris gigantea on Robinson Crusoe Island. Invasive species are crowding out the unique native plants and birds that evolved during more than a million years of isolation before the first people moved into the Juan Fernandez archipelago, composed of three remote islands; Robinson Crusoe, Alejandro Selkirk and Santa Clara, about 416 miles (670 kilometers) west of the Chilean mainland. (AP Photo/Hugo Arnal)
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