Current view: Data table and detailed info
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
Red List history
Migratory status |
not a migrant |
Forest dependency |
does not normally occur in forest |
Land-mass type |
continent
|
Average mass |
- |
Population justification: The global population size has not been quantified, but this species is generally described as rare and patchily distributed (Stotz et al. 1996, Fitzpatrick and Kirwan 2023). It however appears to be common locally, including in Sipaliwini (Suriname) and in Bolivia, where substantial populations remain (O. Ottema in litt. 2020, Fitzpatrick and Kirwan 2023). Density estimates range from 2.2 individuals/km2 to more than 20 individuals/km2 (Fitzpatrick and Kirwan 2023, Marini et al. 2023). Given its overall rarity, localised distribution and strict habitat requirements, an extrapolation of the population based on these estimates is not feasible (Marini et al. 2023). Nevertheless, the global population is likely large.
The species is restricted to specific habitat within the Cerrado biome, open humid grassy habitats, which are easily converted to agriculture (A. Lees in litt. 2024, E.R. Luiz in litt. 2024). Due to the loss of habitat, the population is suspected to be declining.
Trend justification: The species likely used to be more widespread, but is restricted to specific habitat within the Cerrado biome, open humid grassy habitats, which are easily converted to agriculture (A. Lees in litt. 2024, E.R. Luiz in litt. 2024). It is thought to be undergoing slow declines as a consequence of the ongoing conversion and degradation of its grassland habitat (Collar et al. 1992, Fitzpatrick and Kirwan 2023). The rate of reduction is unknown, and the rate of habitat loss relevant for the species has also not been quantified.
Country/territory distribution
Important Bird and Biodiversity Areas (IBA)
Recommended citation
BirdLife International (2024) Species factsheet: Rufous-sided Pygmy-tyrant Euscarthmus rufomarginatus. Downloaded from
https://datazone.birdlife.org/species/factsheet/rufous-sided-pygmy-tyrant-euscarthmus-rufomarginatus on 23/12/2024.
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 23/12/2024.