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

Taxonomic note

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. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2016	Least Concern
2012	Least Concern
2011	Least Concern
2008	Near Threatened	B1a+b(i,ii,iii,v)
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Threatened

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

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	567,000	medium
Number of locations		-
Severely Fragmented		-

	Value	Data quality	Derivation	Year of estimate
No. of mature individuals	unknown	not applicable	not applicable	0
Population trend	decreasing	poor	suspected	-
Decline (3 years/1 generation past)		-	-	-
Decline (5 years/1 generation past)		-	-	-
Decline (10 years/1 generation past)		-	-	-
Decline (10 years/3 generation future)		-	-	-
Decline (10 years/3 generation past and future)		-	-	-
Number of subpopulations		-	-	-
Percentage in largest subpopulation	100	-	-	-
Generation length (yrs)	3.6	-	-	-

Population justification: The global population size has not been quantified, but this species is described as 'uncommon'.

Trend justification: The species's population is suspected to be in decline owing to habitat loss caused by conversion to cattle ranches and mining operations.

Country/Territory	Presence	Origin	Resident	Breeding	Non-breeding	Passage
Brazil	extant	native		yes

Country/Territory	IBA Name
Brazil	Chapada do Catuni
Brazil	Ouro Preto / Mariana
Brazil	Parque Estadual da Serra do Papagaio
Brazil	Parque Estadual do Pico do Itambé e Serra do Gavião
Brazil	Parque Nacional de Itatiaia
Brazil	Serra da Bocaina / Paraty / Angra dos Reis
Brazil	Serra da Canastra
Brazil	Serra do Caraça
Brazil	Serra do Cipó

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Pastureland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Grassland	Subtropical/Tropical Dry	major	resident
Grassland	Subtropical/Tropical High Altitude	suitable	resident
Savanna	Dry	major	resident
Altitude	900 - 1950 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
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 degradation, Ecosystem conversion
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2023) Species factsheet: Polystictus superciliaris. Downloaded from http://datazone.birdlife.org/species/factsheet/grey-backed-tachuri-polystictus-superciliaris on 30/05/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 30/05/2023.