It may be one of the slowest-moving conservation projects in history, not just because of the red tape, but due to the animals themselves: 40 red-footed tortoises are being released into El Impenetrable national park in Argentina in the coming weeks after being rescued from the illegal pet trade in Paraguay and transported to Argentina.
One of the larger tortoises in South America, the red-footed tortoise (Chelonoidis carbonarius) was once found throughout three provinces of Argentina. But the last live tortoise spotted in the country was in the north-eastern province of Formosa in 2002. A shell was found in the same province, 40 miles (60km) from El Impenetrable, in 2016.
