Oxypogon cyanolaemus 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Caprimulgiformes Trochilidae

Scientific Name: Oxypogon cyanolaemus Salvin & Godman, 1880
Common Name(s):
English Blue-bearded Helmetcrest
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.
Taxonomic Notes:

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).

Identification information: 11.2-12.7cm. Medium-sized hummingbird with prominent crest and elongated throat feathers forming a 'beard'. Crest is mostly white, and obvious white frame for the face extends from the rear of the head, around the ear coverts and down to the breast side. In the centre of the 'beard' are metallic purplish-blue feathers, and the tail has an extensive buff-white area on the outer tail feathers. No sound recordings of vocalisations, however a flight call similar to Green Violet-ear Colibri thalassinus was noted on its recent rediscovery (Rojas and Vasquez 2015). Similar spp. O. guerinii, O. lindenii, and O. stuebelii were previously lumped with the present species. O. guerinii has a white stripe on the outer retrices including the shafts, and the beard of the male is green. O. lindenii has a longer crest and greatly reduced green feathering in the beard. O. stuebelii differs in having the white areas replaced by a tan colour, a reduced crest and beard and larger whitish area on the outer rectrices.

Assessment Information [top]

Red List Category & Criteria: Critically Endangered C2a(ii) ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Cortés, O.
Facilitator/Compiler(s): Butchart, S., Ekstrom, J., Martin, R, Symes, A., Taylor, J., Ashpole, J, Sharpe, C.J.
Prior to its rediscovery in March 2015 this recently-split species had not been recorded since 1946 despite several recent surveys. Extensive burning and overgrazing has severely degraded its high altitude páramo habitat, and the remaining population is inferred to be very small and declining. For these reasons the species has been classified as Critically Endangered.
Previously published Red List assessments:

Geographic Range [top]

Range Description:The species is known only from the mountains of the Santa Marta region of north-east Colombia, where three individuals were discovered in March 2015 in approximately 10 ha of fire-damaged páramo (Rojas and Vasquez 2015). It is known from at least 62 museum specimens, the most recent taken in 1946, with apparently no confirmed records in the intervening period (Collar and Salaman 2013). As long ago as the early 20th century the species was reportedly ‘found very sparingly’ and it was noted that ‘bushes and shrubbery are scarce on this páramo [Paramo de Mamarongo], hence the few birds found there' (Todd and Carriker 1922). Surveys during 1999-2003 (Strewe & Navarro 2004), brief surveys of the southern slope of the massif in February 2007 (N. Krabbe in litt. 2007) and surveys at higher elevations in December 2011 (Luna and Quevedo 2012) all failed to record the species.
Countries occurrence:
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:2800
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):3000
Upper elevation limit (metres):5200
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population: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; 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. Given the paucity of records the rate of decline has not been estimated.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:50-249Continuing decline of mature individuals:Yes
Extreme fluctuations:NoPopulation severely fragmented:No
No. of subpopulations:1Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:Yes
No. of individuals in largest subpopulation:100

Habitat and Ecology [top]

Habitat and Ecology:Assumed to be similar to O. guerinii, though little data relating directly to this taxon. It was most recently observed at high altitude (3,930 m elevation) in small patches of habitat on steep slopes surrounded by burnt vegetation (Rojas and Vasquez 2015). It may depend on Espeletia (frailejón) as one of its most important food sources, and there is only one species of this subshrub known from Santa Marta, Libanothamnus occultus, which has been recorded from subparamo to open slopes at 3,400-­4,040 m across the massif (Cleef and Rangel 1984, Cuatrecasas 2013, in Collar and Salaman 2013). Libanothamnus occultus was sparsely distributed at the rediscovery site but was not in flower (Rojas and Vasquez 2015), instead the species was observed feeding on four species of flowering plant which are currently being identified.
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):4.2
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s):

The páramo of the Sierra Nevada de Santa Marta is seriously affected by the grazing of cattle herds and pigs belonging to indigenous communities, who repeatedly burn the páramo for pasture (WWF 2013, Rojas and Vasquez 2015). In March 2015 almost all natural vegetation, except grasses, had been destroyed by fire where the species was observed, foraging resources are thus likely to be spread over a very wide area of possibly hundreds of hectares (Rojas and Vasquez 2015). Indigenous communities collect L. occultus for firewood (Cuatrecasas 2013, in Collar and Salaman 2013), further drastically reducing the population of this frailejón, which is classified as Critically Endangered on the Colombian Red List (García et al. 2005) and which may be a key food source for O. cyanolaemus.

Conservation Actions [top]

Conservation Actions: Conservation and research actions in place
CITES Appendix II. The entire range falls within the Sierra Nevada de Santa Marta National Park which is afforded the highest level of legal protection in Colombia (Rojas and Vasquez 2015), but this has not prevented intense pressure on the páramo.

Conservation and research actions needed
Urgent conservation action is needed to protect the species's remaining habitat. Improve the level of habitat protection within Sierra Nevada de Santa Marta National Park. Use environmental education and community engagement to raise awareness of the species and find ways to protect community interests whilst restoring and protecting remaining habitat for the species (Rojas and Vasquez 2015). Encourage sustainable livestock and land management practices. Seek to supply local people with firewood, in order to avoid further habitat destruction. Continue to search for remaining populations of the species and study their ecology and habitat use. Monitor the extent and condition of habitat.

Citation: BirdLife International. 2016. Oxypogon cyanolaemus. The IUCN Red List of Threatened Species 2016: e.T22726798A94931971. . Downloaded on 20 September 2018.
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