• 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
-	-	-

Red List history

Year	Category	Criteria
2024	Least Concern
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,520,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	500000-4999999 mature individuals	poor	suspected	2021
Population trend	decreasing	-	inferred	2017-2027
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-19%	-	-	-
Generation length	3.27 years	-	-	-

Population justification: The global population is suspected to number 500,000-4,999,999 mature individuals (Partners in Flight 2021). The species is described as fairly common to common throughout much of its range (del Hoyo et al. 2003).

Trend justification: The species is undergoing a decline (Partners in Flight 2021). Despite some tolerance of habitat fragmentation the species is becoming increasingly rare in young and successional growth as well as in plantations (Tarwater and Kelley 2020). Tree cover within the range is lost at a rate of 6-9% over ten years (Global Forest Watch 2023, using Hansen et al. [2013] data and methods disclosed therein). Under the assumption that population declines are roughly equivalent to the rate of tree cover loss, they are here placed in the band 1-19% over ten years.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Belize	extant	native	yes
Colombia	extant	native	yes
Costa Rica	extant	native	yes
Ecuador	extant	native	yes
Guatemala	extant	native	yes
Honduras	extant	native	yes
Nicaragua	extant	native	yes
Panama	extant	native	yes
Peru	extant	native	yes
Venezuela	extant	native	yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Altitude	0 - 2170 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Agro-industry grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem conversion

---

Recommended citation
BirdLife International (2024) Species factsheet: Black-crowned Antshrike Thamnophilus atrinucha. Downloaded from https://datazone.birdlife.org/species/factsheet/black-crowned-antshrike-thamnophilus-atrinucha on 27/12/2024.
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 27/12/2024.