VU
Buffy Helmetcrest Oxypogon stuebelii



Taxonomy

Taxonomic note
Oxypogon guerinii, O. cyanolaemus, O. lindenii and O. stuebelii (del Hoyo and Collar 2014) were previously lumped as O. guerinii following Sibley and Monroe (1990, 1993).

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- C2a(i,ii) A2c+3c+4c; C2a(i,ii); D1

Red List history
Year Category Criteria
2021 Vulnerable A2c+3c+4c
2016 Vulnerable D1
2014 Vulnerable D1
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 4,200 medium
Extent of Occurrence breeding/resident (km2) 4,228
Number of locations 11-100 -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 250-999 poor suspected 2013
Population trend Decreasing inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 30-49 - - -
Decline (10 years/3 generation past and future) 30-49 - - -
Number of subpopulations 1 - - -
Percentage in largest subpopulation 100 - - -

Population justification: The population size has not been estimated directly. Even in its preferred habitat the species appears to be patchily distributed, not common and hard to find. While Renjifo et al. (2016) suspect a population size of below 10,000 mature individuals, other studies suspect an even lower size of fewer than 1,000 mature individuals (Collar and Salaman 2013). Precautionarily, the population is placed here in the band 250-999 mature individuals, though this requires confirmation. It is moreover suspected that all individuals belong to the same subpopulation.

Trend justification: No population trend data are available for the species. Habitat loss within the range is difficult to quantify, as the loss of páramo habitat may be exacerbated by degradation (Renjifo et al. 2016). It is estimated that 50.4% of the original páramo habitat within the range have been lost; between 2000 and 2011, the rate of loss amounted to 25.5% (Renjifo et al. 2016). Assuming that this is continuing at the same pace into the future and accounting for additional impacts of habitat degradation, habitat may be lost at a rate of 30-49% over ten years.


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Colombia Reserva Hidrográfica, Forestal y Parque Ecológico de Río Blanco

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane marginal resident
Grassland Subtropical/Tropical High Altitude major resident
Altitude 3000 - 4600 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%) Very Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Minority (<50%) Very Rapid Declines Medium Impact: 7
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: Oxypogon stuebelii. Downloaded from http://www.birdlife.org on 22/05/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/05/2022.