Threskiornis solitarius 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Pelecaniformes Threskiornithidae

Scientific Name: Threskiornis solitarius (Mourer-Chauviré & Moutou, 1987)
Common Name(s):
English Reunion Ibis, Réunion Flightless Ibis, Réunion Ibis, Réunion Solitaire
Apterornis solitarius Mourer-Chauviré & Moutou, 1987
Raphus solitarius (Mourer-Chauviré & Moutou, 1987) — Sibley and Monroe (1990, 1993)
Taxonomic Source(s): Brooks, T. 2000. Extinct species. In: BirdLife International (ed.), Threatened Birds of the World, pp. 701-708. Lynx Edicions and BirdLife International, Barcelona and Cambridge, U.K.

Assessment Information [top]

Red List Category & Criteria: Extinct ver 3.1
Year Published: 2017
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Brooks, D., Butchart, S., Khwaja, N. & Mahood, S.
This species was found on the Mascarene Islands, but is now considered Extinct having not been seen since 1761. Hunting is likely to have driven its decline.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Threskiornis solitarius is known from bones recently discovered on Réunion (to France) (Mourer-Chauviré and Moutou 1987). It seems likely that the 'solitaire' known from numerous early accounts from Réunion (Cheke 1987) and Rodrigues, Mauritius, was in fact this ibis (Mourer-Chauviré et al. 1995), vindicating arguments for independent evolution of the Mascarene 'solitaires' (Storer 1970), in which case the last account is that of Abbé Gui Pingré (1763) a French astronomer who visited Rodrigues in 1761 to observe the transit of Venus and reported the bird to be near extinction. He had been told by the Commander, Marlène de Puvigné, that it was found only in remote corners of the island. This statement was the last mention of the bird (Staub 1996).

Countries occurrence:
Regionally extinct:
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:No
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No extant population remains.
Additional data:
Continuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:It is likely to have inhabited freshwater wetlands.

Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):10.1
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): Hunting is likely to have been the main cause of its demise.

Amended [top]

Amended reason: Altered threats coding table.

Citation: BirdLife International. 2017. Threskiornis solitarius (amended version of 2016 assessment). The IUCN Red List of Threatened Species 2017: e.T22728791A119423949. . Downloaded on 20 July 2018.
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