Undated picture of Chile's remote Alejandro Selkirk 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 of Chile's remote Alejandro Selkirk 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 of Chile's remote Alejandro Selkirk 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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