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

Taxonomic note

Drymophila caudata, D. klagesi, D. hellmayri and D. striaticeps (del Hoyo and Collar 2016) were previously lumped as D. caudata 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
-	-	C2a(ii)

Red List history

Year	Category	Criteria
2021	Near Threatened	B1b(ii,iii); C2a(ii)
2016	Near Threatened	A2c+3c+4c; B1b(i)
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	medium
Land-mass type		Average mass	12 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	9,500 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	9000 mature individuals	poor	inferred	2021
Population trend	decreasing	-	inferred	2015-2025
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Generation length	2.7 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The global population size has not been quantified directly. Based on the population density of a congener (D. squamata: 5.5 individuals/km²; Santini et al. 2018) and assuming that the species occupies up to 50% of forested habitat within the range (5,400 km²; Global Forest Watch 2021), the population may number c. 14,000 individuals. This roughly equates to 9,000 mature individuals.
The population structure has not been assessed, but due to the continuity of available habitat it is tentatively assumed that the species functions as one subpopulation.

Trend justification: This population is thought to be in decline as a result of habitat clearance within its range. Since 2015, c. 3% of tree cover has been lost within the range (Global Forest Watch 2021). Assuming that forest loss is continuing at the same rate into the future, this equates to a rate of habitat loss of 5% over ten years. The species is restricted to the understorey and midstorey of dense forests (del Hoyo et al. 2020), and as such population declines are inferred to be roughly equivalent to the rate of forest loss, not exceeding 10% over ten years.

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
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	major	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Shrubland	Subtropical/Tropical High Altitude	suitable	resident
Altitude	500 - 1500 m	Occasional altitudinal limits	(max) 2700 m

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Scale Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Climate change & severe weather	Droughts	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		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: Santa Marta Antbird Drymophila hellmayri. Downloaded from https://datazone.birdlife.org/species/factsheet/santa-marta-antbird-drymophila-hellmayri on 18/12/2024.
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 18/12/2024.