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Range DescriptionGallinula nesiotis is found on Gough Island and Tristan da Cunha (St Helena to UK) in the South Atlantic Ocean. It is endemic to Gough Island but, in 1956, seven birds were introduced to Tristan, where it had become extirpated at the end of the 19th century. In 1983, the Gough population was estimated at 2,000-3,000 pairs in 10-12 km2 of suitable habitat5. This estimate has been recalculated as 4,250 pairs, based on the same pair density data but using new data on relative densities in different habitats and total habitat areas6. In 1984, the Tristan population was estimated at c.250 pairs and increasing. It is now distributed throughout the island, being scarce or absent only in the west3.