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

Taxonomic note
Pogonotriccus lanyoni (del Hoyo and Collar 2016) was previously listed as Phylloscartes lanyoni.

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

Red List history

Year	Category	Criteria
2024	Vulnerable	A3c+4c
2016	Endangered	B1ab(i,ii,iii,v);C2a(i)
2012	Endangered	B1ab(i,ii,iii,v);C2a(i)
2008	Endangered	B1a+b(i,ii,iii,v); C2a(i)
2004	Endangered
2000	Endangered
1996	Endangered
1994	Endangered
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	24,900 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	1000-2499 mature individuals	poor	suspected	2016
Population trend	decreasing	poor	suspected	2017-2027
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)	30-49%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	30-49%	-	-	-
Generation length	2.41 years	-	-	-
Number of subpopulations	6-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: There are no estimates of the population size (Renjifo et al. 2016). Nevertheless, based on the localised distribution and low number of records, it is suspected that the population numbers less than 2,500 mature individuals. It is here tentatively placed in the band 1,000-2,499 mature individuals, though an accurate quantification is urgently required.

Trend justification: The population trend has not been investigated, but declines are suspected on the basis of habitat loss.
The rate of tree cover loss within the range has been fairly low over the past ten years (6-9%; Renjifo et al. 2016, Global Forest Watch 2023, using Hansen et al. [2013] data and methods disclosed therein). Logging activities appear to be small-scale, but widespread across the entire range (Global Forest Watch 2023), and it has been hypothesised that the overall rate of habitat loss exceeds the rate of tree cover loss substantially due to the additive impacts of forest degradation (Renjifo et al. 2016). Tentatively, the rate of population decline over the past ten years is here placed in the band 20-29% (per Renjifo et al. 2016).
Rates of habitat loss appear to have started accelerating in c.2017 (Global Forest Watch 2023). It is projected that as a consequence of deforestation, the species will lose an additional 60% of its habitat between 2015 and 2040 (Negret et al. 2021). Assuming an exponential rate of decline, this equates to a rate of habitat loss of 46% over the next ten years. Further assuming that population declines are roughly equivalent to the rate of habitat loss, they are here placed in the band 30-49% over the next ten years.

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

Country/Territory	IBA Name
Colombia	Embalse de San Lorenzo y Jaguas
Colombia	Refugio Río Claro
Colombia	Reserva Regional Bajo Cauca Nechí
Colombia	Serranía de las Quinchas

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Altitude	450 - 1960 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		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
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
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Antioquia Bristle-tyrant Pogonotriccus lanyoni. Downloaded from https://datazone.birdlife.org/species/factsheet/antioquia-bristle-tyrant-pogonotriccus-lanyoni on 23/12/2024.
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 23/12/2024.