The Mascarene Coot (Fulica newtoni) is an extinct species of coot that inhabited the Mascarene islands of Mauritius and Réunion. Long known from subfossil bones found on the former island, but only assumed from descriptions to also have been present on the latter, remains have more recently been found on Réunion also. Early travellers' reports from Mauritius were, in reverse, generally assumed to refer to Common Moorhens, but it seems that this species only colonized the island after the extinction of the endemic coot. The Mascarene Coot was a large bird and while not flightless, it had reduced flying ability, so that if pursued, it would have even more preferred to escape by diving than it is already a general habit of the coots. As the bird had considerable stamina, it could have easily crossed the ocean between the islands, explaining why a single species occurred on both islands. The birds looked like oversized Eurasian Coots, being about 45 cm long, but as they were more likely derived from the Red-knobbed Coot, it is not clear whether the distinguishing red knobs (which are easily overlooked) on top of the white frontal shield were not present or simply not reported by Dubois, who described the species in some detail in 1674.
Dubois is the last author to mention the coot on Réunion. In 1667, François Martin had already complained that hunters had killed off the population on the Etang de Saint-Paul, although the bird was generally considered to be of disagreeable taste. The species fared little better on Mauritius, with Leguat (1708) being, in 1693, the last to record the endemic poules d'eau, saying they were "already rare". Apart from hunting, settlement activity leading to destruction of the marshland habitat seems to have played a major role in the species' extinction.