LC
Bay-chested Warbling-finch Castanozoster thoracicus



Taxonomy

Taxonomic note
Castanozoster thoracicus (del Hoyo and Collar 2016) was previously placed in the genus Poospiza and listed as P. thoracica following SACC (2005 & updates); Sibley & 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. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. A classification of the bird species of South America. Available at: #http://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
2016 Least Concern
2012 Least Concern
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 full migrant Forest dependency medium
Land-mass type Average mass 12 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 273,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected -
Generation length 3.8 years - - -

Population justification: The global population size has not been quantified, but this species is described as 'uncommon' (Stotz et al. 1996).

Trend justification: The population is suspected to be in decline owing to ongoing habitat destruction.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Brazil extant native

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Brazil Serra dos Órgãos
Brazil Serra do Tinguá
Brazil Serra do Marumbi
Brazil Área de Proteção Ambiental de Guaratuba
Brazil Parque Nacional de Itatiaia
Brazil Região dos Aparados da Serra

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest suitable non-breeding
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest suitable breeding
Forest Subtropical/Tropical Moist Montane major breeding
Forest Subtropical/Tropical Moist Montane major non-breeding
Forest Temperate suitable breeding
Forest Temperate suitable non-breeding
Shrubland Subtropical/Tropical High Altitude major breeding
Shrubland Subtropical/Tropical High Altitude major non-breeding
Altitude 800 - 2100 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Castanozoster thoracicus. Downloaded from https://datazone.birdlife.org/species/factsheet/bay-chested-warbling-finch-castanozoster-thoracicus on 26/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 26/02/2024.