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

Taxonomic note

Myiothlypis conspicillata (del Hoyo and Collar 2016) was previously placed in the genus Basileuterus and listed as B. conspicillatus following SACC (2005 & updates); Sibley & Monroe (1990, 1993); 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.
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
-	-	-

Red List history

Year	Category	Criteria
2023	Near Threatened	B1b(iii)
2016	Near Threatened	A2c+3c+4c;B1ab(i,ii,iii,v)
2012	Near Threatened	A2c+3c+4c;B1ab(i,ii,iii,v)
2008	Near Threatened	A2c; A3c; A4c; B1a+b(i,ii,iii,v)
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	10,500 km2	medium
Area of Occupancy (breeding/resident)	8,640 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	10300-20600 mature individuals	poor	inferred	2016
Population trend	decreasing	poor	suspected	2017-2027
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
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	2.55 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The global population size has not been quantified, but the species is described as common, particularly between 1,000 and 1,500 m (Stotz et al. 1996, Gómez Montes 2020).
Based on the population density of related species (Basileuterus melanogenys: 5 individuals/km²; M. nigrocristata and M. luteoviridis: 10 individuals/km²) and an area of occupied habitat of 3,091 km², the population was inferred to number 15,450-30,900 individuals (Renjifo et al. 2016 and references therein). This roughly equates to 10,300-20,600 mature individuals.

Trend justification: Despite some tolerance of converted habitats, the species is absent in areas without a continuous, dense understory (Renjifo et al. 2016). Therefore, it is suspected to undergo a decline as a consequence of the loss and degradation of its habitat.
Within the range, 4% of tree cover have been lost over the past ten years; since 2017 this has been increasing to a rate equivalent to 6% over ten years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). It is assumed that population declines may be roughly equivalent to the rate of tree cover loss; they are here placed in the band 1-9% over ten years.

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

Country/Territory	IBA Name
Colombia	Cuchilla de San Lorenzo
Colombia	Eco-parque Los Besotes
Colombia	Valle de San Salvador
Colombia	Valle del Río Frío

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	suitable	resident
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	450 - 2830 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem conversion
Agriculture & aquaculture	Wood & pulp plantations - Small-holder plantations	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
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 Indirect ecosystem effects, Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: White-lored Warbler Myiothlypis conspicillata. Downloaded from https://datazone.birdlife.org/species/factsheet/white-lored-warbler-myiothlypis-conspicillata 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.