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Prior to the 19th century the Mexican Island of Guadalupe was an untouched ecological paradise.

But when Russian traders used the island as a stop to restock their water supplies they brought and set free domestic goats on the island to be hunted on later voyages.

The goats thrived and multiplied, quickly causing an extreme imbalance in the island's ecosystem by decimating plant and bird species.

In 2000, conservationist, Professor Exequiel Ezcurra, and a team of skilled researchers set about saving the island.