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Venezuelan Sylph Aglaiocercus berlepschi

IUCN Red List Criteria

Critically Endangered  
Endangered B1ab(ii,iii,v) 
Vulnerable  

IUCN Red List history

Year Category
2012 Endangered
2008 Endangered
2007 Endangered
2006 Not Evaluated
2004 Not Recognised
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised

Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type   Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 4,200 medium
Number of locations -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 1500-7000 poor Suspected 2006
Population trend Decreasing poor -
Number of subpopulations 2-100 - - -
Largest subpopulation 1001-10000 - - -
Generation length (yrs) 4.2 - - -
Population justification: This species is locally fairly common in suitable habitat, and considered less vulnerable than others (such as Grey-headed Warbler Basileuterus griseiceps) to removal of undergrowth for coffee plantations (Boesman in litt. 2006). Its population is estimated to number 2,500-9,999 individuals, equating to 1,667-6,666 mature individuals, which is rounded here to 1,500-7,000 mature individuals.
Trend justification: A moderately rapid and ongoing population decline is suspected on the basis of rates of habitat destruction and fragmentation (Sharpe and Lentino 2008), although there are no analyses to support this (J. Pérez-Emán in litt. 2012).

Country/Territory distribution

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

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Venezuela Parque Nacional El Guácharo (part of Cordillera de Caripe AZE) site factsheet
Venezuela Zona Protectora Macizo Montañoso del Turimiquire (part of Cordillera de Caripe AZE) site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Shrubland Subtropical/Tropical High Altitude major resident
Altitude 1450 - 1800 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 Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Residential & commercial development Commercial & industrial areas Timing Scope Severity Impact
Future Minority (<50%) Very Rapid Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Future Minority (<50%) Rapid Declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2014) Species factsheet: Aglaiocercus berlepschi. Downloaded from http://www.birdlife.org on 21/08/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/08/2014.

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 Endangered
Family Trochilidae (Hummingbirds)
Species name author (E. Hartert, 1898)
Population size 1500-7000 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 4,200 km2
Country endemic? Yes
Links to further information
- Summary information on this species