• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
D	D	D1

Red List history

Year	Category	Criteria
2024	Extinct
2016	Extinct
2012	Extinct
2008	Extinct
2004	Extinct
2000	Extinct
1994	Extinct
1988	Extinct

Migratory status	not a migrant	Forest dependency	high
Land-mass type		Average mass	-

	Estimate	Data quality
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	0 mature individuals	good	estimated	-
Population trend		-	-	-
Generation length	3.98 years	-	-	-

Population justification: None remain.

Trend justification: This species appeared to have persisted into the 19th century, unlike other Mascarenotus owls. Desjardins reported that it was fairly common even as late as the 1830s, but his 1837 reports were the last, and Clark (1859) specifically wrote that it was extinct in 1859 (Cheke 1987), likely caused by the destruction of the island's forests.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Mauritius	extinct	native	yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	possible	resident
Forest	Subtropical/Tropical Moist Montane	possible	resident
Altitude		Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Unknown		Unknown		Past Impact
		Stresses Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Unknown		Unknown		Past Impact
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Unknown		Unknown		Past Impact
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: Mauritius Owl Mascarenotus sauzieri. Downloaded from https://datazone.birdlife.org/species/factsheet/mauritius-owl-mascarenotus-sauzieri on 22/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 22/12/2024.