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

Taxonomic source(s)
Campagna, L.; St Clair, J. J. H.; Lougheed, S. C.; Woods, R. W.; Imberti, S.; Tubaro, P. L. 2012. Divergence between passerine populations from the Malvinas - Falkland Islands and their continental counterparts: a comparitive phylogeographical study. Biological Journal of the Linnean Society DOI: 10.1111/j.1095-8312.2012.01898.x.
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.
Woods, R. W. 1993. Cobb's Wren Troglodytes (aedon) cobbi of the Falkland Islands. Bulletin of the British Ornithologists' Club 113: 195-207.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2017	Least Concern
2016	Vulnerable	D2
2012	Vulnerable	D2
2008	Vulnerable	D2
2006	Vulnerable
2004	Vulnerable
2000	Vulnerable
1996	Vulnerable
1994	Vulnerable
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	does not normally occur in forest
Land-mass type	shelf island	Average mass	19 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	29,200 km2	medium
Number of locations	11-100	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	12000 mature individuals	good	estimated	2000
Population trend	stable	poor	estimated	1998-2008
Rate of change over the past 10 years/3 generations (longer of the two periods)	0%	-	-	-
Generation length	3.5 years	-	-	-
Number of subpopulations	2-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: An estimate of 9,000-16,000 individuals is given by Woods (2000). In 2008 this estimate had remained unchanged at 9,000-16,000 individuals or 6,000 pairs (12,000 mature individuals).

Trend justification: No new data on population trends have been provided since Woods (2000). This species is assumed to be stable, owing to lack of current direct threats.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Falkland Islands (Malvinas)	extant	native		yes

Country/Territory	IBA Name
Falkland Islands (Malvinas)	Beauchêne Island
Falkland Islands (Malvinas)	Bird Island
Falkland Islands (Malvinas)	Hummock Island Group
Falkland Islands (Malvinas)	Jason Islands Group
Falkland Islands (Malvinas)	Kidney Island Group
Falkland Islands (Malvinas)	Lively Island Group
Falkland Islands (Malvinas)	New Island Group
Falkland Islands (Malvinas)	Passage Islands Group
Falkland Islands (Malvinas)	Pebble Island Group
Falkland Islands (Malvinas)	Sea Lion Islands Group
Falkland Islands (Malvinas)	Speedwell Island Group
Falkland Islands (Malvinas)	West Point Island Group

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Grassland	Subantarctic	major	resident
Altitude		Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Slow, Significant Declines		Low Impact: 3
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Rattus norvegicus	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Slow, Significant Declines		Low Impact: 3
		Stresses Reduced reproductive success
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Rattus rattus	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Slow, Significant Declines		Low Impact: 3
		Stresses Reduced reproductive success
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Slow, Significant Declines		Low Impact: 3
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: Cobb's Wren Troglodytes cobbi. Downloaded from https://datazone.birdlife.org/species/factsheet/cobbs-wren-troglodytes-cobbi on 22/11/2024.
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 22/11/2024.