Complex sentence: The Tristan Moorhen "(Gallinula nesiotis)" was an extinct flightless rail from the South Atlantic island of Tristan da Cunha and was physically similar to the Gough Island Moorhen of Gough Island, 395 miles to the southeast.
Split into simpler sentences: The Tristan Moorhen "(Gallinula nesiotis)" is an extinct flightless rail from the South Atlantic island of Tristan da Cunha. It was physically similar to the Gough Island Moorhen of Gough Island, located 395 miles to the southeast.