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Bell's Vireo Vireo bellii

IUCN Red List Criteria

Near Threatened (criteria nearly met) A2bc+3bc+4bc 

IUCN Red List history

Year Category
2012 Near Threatened
2008 Near Threatened
2004 Near Threatened
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern

Species attributes

Migratory status full migrant Forest dependency Low
Land mass type continent
Average mass 8.5 g

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 291,000 medium
Extent of Occurrence non-breeding (km2) 291,000 medium
Number of locations -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals medium Estimated 2003
Population trend Decreasing medium -
Number of subpopulations - - -
Largest subpopulation - - -
Generation length (yrs) 4.1 - - -
Population justification: Rich et al. (2004).
Trend justification: This species has undergone a large and statistically significant decrease over the last 40 years in North America (-66.1% decline over 40 years, equating to a -23.7% decline per decade; data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007).

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
El Salvador Native Extant   Yes    
Guatemala Native Extant   Yes    
Honduras Native Extant   Yes    
Mexico Native Extant       Yes
Nicaragua Native Extant   Yes    
USA Native Extant Yes      

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Honduras Chismuyo/Coyolito site factsheet
Honduras El Jicarito site factsheet
Honduras La Botija site factsheet
Mexico Istmo de Tehuantepec-Mar Muerto site factsheet
USA Anza-Borrego Riparian site factsheet
USA Camp Pendleton site factsheet
USA Fort Chaffee site factsheet
USA Lynnville-Squaw Creek Mine Complex site factsheet
USA San Diego National Wildlife Refuge-Eastern site factsheet
USA San Luis Rey River site factsheet
USA San Pasqual Valley site factsheet
USA Santa Ana River Valley site factsheet
USA Santa Clara River Valley site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland suitable non-breeding
Forest Temperate major breeding
Shrubland Subtropical/Tropical Dry major breeding
Shrubland Subtropical/Tropical Dry major non-breeding
Shrubland Subtropical/Tropical High Altitude suitable breeding
Shrubland Subtropical/Tropical High Altitude suitable non-breeding
Shrubland Subtropical/Tropical Moist suitable breeding
Shrubland Subtropical/Tropical Moist suitable non-breeding
Shrubland Temperate suitable breeding
Altitude 0 - 2000 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
Agriculture & aquaculture Livestock farming & ranching / Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Problematic native species/diseases Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Species mortality
Natural system modifications Dams & water management/use / Dams (size unknown) Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion
Pollution Agricultural & forestry effluents / Type Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Ecosystem degradation
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2014) Species factsheet: Vireo bellii. Downloaded from http://www.birdlife.org on 20/10/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/10/2014.

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 Near Threatened
Family Vireonidae (Vireos and allies)
Species name author Audubon, 1844
Population size mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 291,000 km2
Country endemic? No
Links to further information
- Summary information on this species