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Niceforo's Wren Thryothorus nicefori

IUCN Red List Criteria

Critically Endangered C2a(i);D 
Endangered C2a(i);D 
Vulnerable B1ab(iii,v);C2a(i);D1+2 

IUCN Red List history

Year Category
2012 Critically Endangered
2011 Critically Endangered
2010 Critically Endangered
2009 Critically Endangered
2008 Critically Endangered
2004 Critically Endangered
2000 Critically Endangered
1996 Critically Endangered
1994 Critically Endangered
1988 Threatened

Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type continent
Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 4,700 medium
Number of locations 10 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 30-200 good Observed 2009
Population trend Decreasing poor -
Number of subpopulations 2-100 - - -
Largest subpopulation 1-50 - - -
Generation length (yrs) 3.9 - - -
Population justification: Surveys between 2004 and 2008 recorded 77 individuals. An approximate estimate based on these surveys and other records gives a total global population of 250 individuals (S. Valderrama in litt. 2010). However, until this is confirmed to be accurate, the population band of 50-249 individuals seems appropriate. This equates to 33-166 mature individuals, rounded here to 30-200 mature individuals.
Trend justification: The species is suspected to be in decline owing to the spread of agriculture near the type locality, and because of threats to its dry forest habitat, although the likely rate of decline has not been quantified.

Country/Territory distribution

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

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Colombia Bosques Secos del Valle del Río Chicamocha site factsheet
Colombia Soatá site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Shrubland Subtropical/Tropical Dry major resident
Altitude 800 - 2100 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Agro-industry farming Timing Scope Severity Impact
Ongoing Whole (>90%) Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops / Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Whole (>90%) Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching / Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Whole (>90%) Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching / Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Whole (>90%) Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation
Natural system modifications Fire & fire suppression / Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2014) Species factsheet: Thryothorus nicefori. Downloaded from http://www.birdlife.org on 19/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/12/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Critically Endangered
Family Troglodytidae (Wrens)
Species name author Meyer de Schauensee, 1946
Population size 30-200 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 4,700 km2
Country endemic? Yes
Links to further information
- Summary information on this species