Data Zone
Justification of Red List category
This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km² combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Population justification
The global population size has not been quantified, but this species is described as locally fairly common (Stotz et al. 1996, Zimmer and Isler 2020, Silveira et al. 2022). It is frequently observed throughout its range (eBird 2022), and the population is unlikely to be small.
Trend justification
Due to its dependence on bamboo, large-scale die-off events of bamboo may cause natural fluctuations in the population size (Zimmer and Isler 2020). However overall, although exact trend data are lacking, the population is thought to be in decline owing to the continuing loss and degradation of habitats within the range. The species has reportedly suffered local extinctions (CSS Brazil and CEMAVE-ICMBio 2020).
Over ten years, 7% of tree cover is lost within the range (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). As the species is restricted to forests with dense understory of bamboo and vine tangles, population declines may exceed the rate of tree cover loss. Tentatively, declines are here placed in the band 10-19% over ten years.
Drymophila ochropyga occurs in southeast Brazil from Bahia to Santa Catarina.
It occurs in bamboo-dominated, tangled understorey of lowland and montane evergreen forest (Zimmer and Isler 2020). It feeds on arthropods (Zimmer and Isler 2020). The only nest reported was a cup with a dome, made of dry leaves of bamboo and other plants and lined with fibers (Leite et al. 2022). Otherwise, its ecology is not well known.
Agricultural conversion and deforestation for mining and plantation production historically threatened its lowland forests. Current key threats are urbanisation, industrialisation, agricultural expansion, colonisation and associated road-building (Dinerstein et al. 1995, Fearnside 1996).
Conservation Actions Underway
No targeted actions are known.
Conservation Actions Proposed
Quantify the population size. Repeat surveys of known sites to monitor the population trend. Ensure that remaining tracts of suitable habitat receive adequate protection.
Text account compilers
Hermes, C.
Contributors
Butchart, S., Gilroy, J., Goerck, J.M., Lima, D.M., Sharpe, C.J. & Subirá, R.
Recommended citation
BirdLife International (2024) Species factsheet: Ochre-rumped Antbird Drymophila ochropyga. Downloaded from
https://datazone.birdlife.org/species/factsheet/ochre-rumped-antbird-drymophila-ochropyga on 23/11/2024.
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 23/11/2024.