• 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
-	-	B1ab(iii,v); C2a(i)

Red List history

Year	Category	Criteria
2016	Vulnerable	B1ab(iii,v);C2a(i)
2013	Vulnerable	B1ab(iii,v);C2a(i)
2012	Vulnerable	B1ab(iii,v);C2a(i)
2008	Endangered	B1a+b(iii,v)
2004	Endangered
2000	Endangered
1996	Endangered
1994	Endangered
1988	Threatened

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

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	18,200	medium
Number of locations	6-10	-
Fragmentation		-

	Estimate	Data quality	Derivation	Year of estimate
No. of mature individuals	1500-7000	poor	estimated	2000
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)	1-9	-	-	-
Decline (10 years/3 generation past and future)	1-9	-	-	-
Number of subpopulations	2-100	-	-	-
Largest subpopulations	1-89	-	-	-
Generation length (yrs)	3.5	-	-	-

Population justification: The population is estimated to number 2,500-9,999 individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size, and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied. This estimate is equivalent to 1,667-6,666 mature individuals, rounded here to 1,500-7,000 mature individuals.

Trend justification: A slow and ongoing population decline is suspected, owing to rates of habitat loss.

Country/Territory	Occurrence status	Presence	Resident	Breeding	Non-breeding	Passage
Colombia	N	Extant		Yes

Country/Territory	IBA Name
Colombia	Bosques del Oriente de Risaralda
Colombia	Cuenca del Río Toche
Colombia	Páramos y Bosques Altoandinos de Génova
Colombia	Reserva Forestal Protectora CHEC
Colombia	Reserva Hidrográfica, Forestal y Parque Ecológico de Río Blanco
Colombia	Alto Quindío
Colombia	Reservas Comunitarias de Roncesvalles
Colombia	Reserva Natural Ibanasca
Colombia	Reserva Natural Río Ñambí

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 Montane	major	resident
Altitude	1800 - 3140 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 degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, 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 degradation, 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
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Past, Unlikely to Return		Majority (50-90%)		Negligible declines		Past Impact
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2021) Species factsheet: Grallaria milleri. Downloaded from http://www.birdlife.org on 16/01/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 16/01/2021.