CR
Blue-bearded Helmetcrest Oxypogon cyanolaemus



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(ii) C2a(i,ii); D C2a(i,ii); D1

Red List history
Year Category Criteria
2018 Critically Endangered C2a(ii)
2016 Critically Endangered C2a(ii)
2015 Critically Endangered C2a(ii)
2014 Critically Endangered C2a(ii)
Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 2,800 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 50-249 poor estimated 2015
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) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 1 - - -
Largest subpopulations 100 - - -
Generation length (yrs) 4.2 - - -

Population justification: There had been no confirmed records of the species since 1946 despite a number of recent surveys, until three birds were discovered in March 2015. Even in the early 20th century it was reported to be scarce. The remaining population is presumed to be very small and has recently been estimated to number in the hundreds, based on recorded population densities of congeners (Cortes-Herrera and Villagran 2016). The population estimate is placed here in the band 50-249 mature individuals.

Trend justification: The species's population is suspected to have declined owing to extensive and severe habitat loss and degradation caused by extensive burning, overgrazing and deforestation. The species's area of habitat has been estimated to have declined by 10.6% and it is likely that the species's population decline has been greater than this due to other factors such as the loss of frailej√≥n, however it is considered that this decline has occurred over a long period of time (Cortes-Herrera and Villagran 2016). Given the paucity of records, the rate of decline has not been estimated.


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 Sierra Nevada de Santa Marta National Natural Park and surrounding areas

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 - 5200 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 Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Small-holder grazing, ranching or farming 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 - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2020) Species factsheet: Oxypogon cyanolaemus. Downloaded from http://www.birdlife.org on 22/10/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/10/2020.