Current view: Data table and detailed info
Taxonomic note
Zimmerius improbus and Z. petersi (del Hoyo and Collar 2016) were previously lumped as Z. improbus following Sibley and Monroe (1990, 1993).
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.
IUCN Red list criteria met and history
Red List criteria met
Red List history
| Migratory status |
not a migrant |
Forest dependency |
High |
| Land mass type |
|
Average mass |
- |
Population justification: The global population size has not been quantified given recent taxonomic splits. Prior to being split, the species has been described as uncommon to common (del Hoyo et al. 2004).
Trend justification: The population trend has not been investigated. Tree cover loss within the range is very low (<2% over ten years; Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). Given the species' apparent tolerance of some habitat degradation and open habitats (Jones 2020), deforestation is unlikely to drive a population decline. Therefore, in the absence of evidence for any substantial threats, the population is suspected to be stable.
Country/territory distribution
Important Bird and Biodiversity Areas (IBA)
Recommended citation
BirdLife International (2023) Species factsheet: Zimmerius improbus. Downloaded from
http://www.birdlife.org on 28/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 28/03/2023.
