EN
Bolivian Spinetail Cranioleuca henricae



Taxonomy

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#.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- B1ab(i,ii,iii,v) B1ab(i,ii,iii,v); C2a(i)

Red List history
Year Category Criteria
2016 Endangered B1ab(i,ii,iii,v)
2013 Endangered B1ab(i,ii,iii,v)
2012 Endangered B1ab(i,ii,iii,v)
2008 Endangered B1a+b(i,ii,iii,v)
2004 Endangered
2000 Endangered
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 3,000 medium
Number of locations 6 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 1600-6700 medium estimated 2010
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 - - -
Generation length (yrs) 3.8 - - -

Population justification: In 2010, surveys utilising standard point count methodology yielded an average of 1.32 individuals/survey point (0.785 ha), suggesting by extrapolation a conservative estimated density of 1.68 individuals/ha (S. K. Herzog in litt. 2013). Distribution modelling (not equivalent to Extent of Occurrence) has yielded an estimate of 1,889 km2 for this species (Herzog et al. 2012), which (when combined with the conservative estimate of 168 individuals/km2) suggests that even if only 1% of this area contained suitable habitat the population would be expected to number c.3,000 individuals. The total population is therefore placed in the band 2,500-9,999 individuals, equivalent to c.1,600-6,700 mature individuals.

Trend justification: A slow and continuing population decline is suspected, owing to on-going habitat loss, fragmentation and degradation.


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Bolivia Cuenca Cotacajes
Bolivia Tacacoma-Quiabaya y Valle de Sorata

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry major resident
Shrubland Subtropical/Tropical Dry major resident
Shrubland Subtropical/Tropical High Altitude major resident
Altitude 1800 - 3300 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Livestock farming & ranching Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation
Geological events Avalanches/landslides Timing Scope Severity Impact
Future Majority (50-90%) Very Rapid Declines Medium Impact: 6
Stresses
Ecosystem degradation
Natural system modifications Fire & fire suppression Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2019) Species factsheet: Cranioleuca henricae. Downloaded from http://www.birdlife.org on 16/10/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 16/10/2019.