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

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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
A3c+4c; C2a(i,ii)	A2c+3c+4c; B1ab(i,ii,iii,iv,v); C2a(i,ii); D	A2c+3c+4c; B1ab(i,ii,iii,iv,v); C2a(i,ii); D1

Red List history

Year	Category	Criteria
2018	Critically Endangered	A3c+4c; C2a(i,ii)
2016	Critically Endangered	A3c+4c
2015	Critically Endangered	A3c+4c
2013	Critically Endangered	A3c+4c
2012	Critically Endangered	A3c+4c
2011	Critically Endangered	A3c; A4c
2008	Vulnerable	B1a+b(i,ii,iii,iv,v)
2005	Vulnerable
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,800 km2	good
Number of locations	1	-
Severely fragmented?	yes	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	50-249 mature individuals	poor	suspected	2003
Population trend	decreasing	poor	inferred	2000-2011
Rate of change over the past 10 years/3 generations (longer of the two periods)	50-79%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	80-100%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	80-100%	-	-	-
Generation length	3.6 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The species's population size has not been formally estimated and, in the absence of sufficient data, it is preliminarily estimated to number 50-249 mature individuals; however detailed research is urgently required. This estimate equates to 75-379 individuals in total, rounded here to 70-400 individuals.

Trend justification: The species's population is suspected to have undergone a very rapid decline of more than 70% over the last 10 years (Fundación ProAves de Colombia 2011) owing to extensive and severe habitat loss and degradation caused by deforestation, extensive burning and overgrazing. Given the severity of threats, this decline is expected to further accelerate in the future (Fundación ProAves de Colombia 2011).

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Grassland	Subtropical/Tropical High Altitude	suitable	resident
Shrubland	Subtropical/Tropical High Altitude	suitable	resident
Altitude	3200 - 4600 m	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		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: Santa Marta Wren Troglodytes monticola. Downloaded from https://datazone.birdlife.org/species/factsheet/santa-marta-wren-troglodytes-monticola on 25/11/2024.
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 25/11/2024.