Tristan moorhen

Tristan moorhen
Tristan moorhen
Conservation status
Extinct (late 19th century)  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Gruiformes
Family:	Rallidae
Genus:	Gallinula
Species:	†G. nesiotis
Binomial name
†Gallinula nesiotis Sclater, PL, 1861

The Tristan moorhen or Tristan gallinule (Gallinula nesiotis) is an extinct species of flightless rail endemic to the South Atlantic island of Tristan da Cunha. It was very similar to the Gough moorhen of Gough Island, located 395 miles (636 km) to the southeast.

The once abundant Tristan moorhen had become rare by 1873, and by the end of 19th century it was extinct as a result of hunting, predation by introduced species (rats, cats and pigs) and habitat destruction by fire. A handful of taxidermical specimens of the Tristan moorhen have been preserved, including one at Harvard University.

In 1956 the closely related Gough moorhen G. comeri was introduced to Tristan da Cunha. On the basis of DNA sequencing of both recently collected and historical material from both species, Groenenberg et al (2008) concluded that the genetic distances between G. nesiotis and G. comeri are of at least the same size as those found between subspecies of G. chloropus in the literature. They propose that the extinct moorhen of Tristan (Gallinula nesiotis) and the moorhens that live on Gough and Tristan today (G. comeri) be regarded as subspecies.