LC
Red-and-black Grosbeak Caryothraustes erythromelas



Taxonomy

Taxonomic note

Caryothraustes erythromelas (del Hoyo and Collar 2016) was previously placed in the genus Periporphyrus following SACC (2005 & updates); Sibley and Monroe (1990, 1993); Stotz et al. (1996).

 

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2020 Least Concern
2018 Near Threatened A3c
2016 Near Threatened A3c
2013 Near Threatened A3c
2012 Near Threatened A3c
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

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

Estimate Data quality
Extent of Occurrence (breeding/resident) 2,530,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 100000-499999 mature individuals poor suspected 2020
Population trend decreasing - inferred 2016-2026
Rate of change over the past 10 years/3 generations (longer of the two periods) 7-11% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 7-15% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 7-15% - - -
Generation length 3.26 years - - -

Population justification: The global population size has not been estimated directly, but this species is described as 'uncommon and patchily distributed' (Stotz et al. 1996, O. Ottema in litt. 2020), and is not present in all suitable habitat patches within its range (Thiollay 2002). Based on the minimum recorded population density of a congener (Caryothraustes canadensis, 2.1 individuals per km2; Thiollay 1986), the estimated area of forest within the species's range in 2010 (1,090,000 km2; Global Forest Watch 2020), and assuming 10-25% of the forest is occupied by the species, the population size is tentatively suspected to fall within the band 216,200 - 540,800 individuals, roughly equating to 144,100 - 360,500 mature individuals and here placed in the band 100,000 - 499,999 mature individuals.

Trend justification: Remote-sensed data indicates that over ten years from 2009-2019, approximately 7% of tree cover was lost within the species's mapped range (Global Forest Watch 2020). The species is therefore inferred to be undergoing a continuing decline.

An analysis of the impact of disturbance on forest species in ParĂ¡ found that in private lands or sustainable-use reserves, the impact of disturbance on biodiversity was equivalent to that of an additional 51% loss of forest (Barlow et al. 2016). Assuming that the population size is proportional to forest area, and taking into account the potential additional impact of disturbance, the population size is suspected to have undergone a reduction 7-11% over the past decade.

Over the period 2016-2019, approximately 4% of the total forest area was lost. If this rate were to continue over the next ten years, this would amount to a loss of 10%. Assuming that the population size is proportional to forest area, and that disturbance may increase the impact of deforestation by 51%, a population reduction of 7-15% is suspected over the next decade.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Brazil extant native yes
French Guiana extant native yes
Guyana extant native yes
Suriname extant native yes
Venezuela extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 0 - 1100 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 Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Agro-industry 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
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Red-and-black Grosbeak Caryothraustes erythromelas. Downloaded from https://datazone.birdlife.org/species/factsheet/red-and-black-grosbeak-caryothraustes-erythromelas on 24/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 24/12/2024.