NT
Unicolored Tapaculo Scytalopus unicolor



Taxonomy

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: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2022 Near Threatened B1ab(ii,iii,v); C2a(i)
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
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 17,200 medium
Extent of Occurrence breeding/resident (km2) 10,000
Number of locations 11-100 -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 8500-11500 poor inferred 2021
Population trend Decreasing 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 5-100 - - -
Percentage in largest subpopulation 1-89 - - -

Population justification: The global population size has not been quantified, but the species is described as common to fairly common (Stotz et al. 1996).
 
Currently, 60,000-80,000 ha within its range are covered by forest with 75% canopy (Global Forest Watch 2021). Assuming that this species occurs at a similar density than a congener (S. robbinsi in Ecuador: 2 mature individuals in 7 ha of forest; Hermes et al. 2017), and further assuming that half of the forests are occupied, the population may number 8,500-11,500 mature individuals. This number however requires confirmation.

Based on the spatial spread of records (eBird 2021) and accounting for the generally low dispersal abilities of tapaculos (Krabbe and Schulenberg 2003), it is conceivable that the species forms several small subpopulations.

Trend justification: This species is assessed as being decline owing to ongoing habitat destruction (del Hoyo et al. 2003).
Currently, tree cover within the range is lost at a rate of up to 7% over ten years (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). While the species is forest-restricted, it appears to tolerate some degree of disturbance, as long as a dense understory vegetation is present (Krabbe and Schulenberg 2020). Population declines are therefore tentatively placed in the band 1-9% over ten years.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Peru N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Ecuador Bosque Protector Colambo-Yacuri
Ecuador Cordillera del Cóndor
Ecuador Utuana-Bosque de Hanne
Peru Cordillera Yanachaga
Peru Playa Pampa
Peru Río Mantaro - Cordillera Central
Peru Sur de la Cordillera de Colán
Peru Cordillera Vilcabamba
Peru Bosque de Cuyas
Peru Aypate
Peru Toldo
Peru Huamba
Peru Chiñama
Peru Laquipampa
Peru Llaguén
Peru Cerro Chinguela
Peru Florida y Laguna Pomacochas

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 2000 - 3170 m Occasional altitudinal limits  

Threats & impact
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 degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
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
Ecosystem degradation

Recommended citation
BirdLife International (2022) Species factsheet: Scytalopus unicolor. Downloaded from http://www.birdlife.org on 07/10/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 07/10/2022.