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

Taxonomic note

Cinclodes antarcticus and C. maculirostris (del Hoyo and Collar 2016) were previously lumped as C. antarcticus following SACC (2005 & updates), Sibley & Monroe (1990, 1993) and Stotz et al. (1996).

 

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2021	Near Threatened	A2ace+3ce+4ace
2016	Near Threatened	A2e+3e+4e
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	does not normally occur in forest
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	42,700 km2	medium
Number of locations	11-100	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	3000-19000 mature individuals	poor	suspected	2020
Population trend	decreasing	-	inferred	2015-2026
Rate of change over the past 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Generation length	3.6 years	-	-	-
Number of subpopulations	2-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The global population size has not been quantified directly, but this species is described as 'fairly common' (Stotz et al. 1996). Based on an observed population density of congeners in Argentina (C. fuscus: 6-26 individuals/km²; C. oustaleti: individuals/km²; C. patagonicus: 4-20 individuals/km²; Santini et al. 2018) and assuming that only 10% of the mapped range is occupied to account for its sensitivity to introduced predators, the population may number 4,400-28,600 individuals, which roughly equates to 3,000-19,000 mature individuals.
Based on observational records (per eBird 2020), it is assumed that the species forms several disjunct subpopulations.

Trend justification: The population trend has not been quantified directly, but it is assumed that the species used to be more widespread (del Hoyo et al. 2020). The decline is likely caused by predation by invasive mammals, and the species is now largely restricted to predator-free islands (del Hoyo et al. 2003, 2020).
The rate of decline is tentatively placed in the band 20-29% over three generations (10.8 years). There is no indication of a decrease in threats, and hence the decline is assumed to go on at this rate into the future.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Argentina	extant	native	yes
Chile	extant	native	yes

Country/Territory	IBA Name
Argentina	Península Mitre
Chile	Parque Nacional Cabo de Hornos

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Marine Coastal/Supratidal	Sea Cliffs and Rocky Offshore Islands	major	resident
Marine Intertidal	Rocky Shoreline	major	resident
Marine Intertidal	Tidepools	major	resident
Altitude	0 - 100 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Future		Whole (>90%)		Unknown		Unknown
		Stresses Indirect ecosystem effects, Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Rapid Declines		Medium Impact: 7
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Rapid Declines		Medium Impact: 7
		Stresses Species mortality

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Recommended citation
BirdLife International (2024) Species factsheet: Black Cinclodes Cinclodes maculirostris. Downloaded from https://datazone.birdlife.org/species/factsheet/black-cinclodes-cinclodes-maculirostris on 23/11/2024.
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 23/11/2024.