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 or Area of Occupancy <2,000 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
It is thought to have a smaller population than most species from similar habitat (Whitney et al. 2013), but the total population size has not been quantified. The subpopulation structure is not known.
Trend justification
Over the last ten years to 2020, approximately 3% of tree cover with at least 50% canopy cover was lost from within the species's known range (Global Forest Watch 2021). Projecting forwards, up to 5% may be lost over the next decade. The population size is therefore suspected to be decreasing, at a rate of less than 10% per decade.
Manicore Antwarbler occurs in Amazonian Brazil on right bank of R Madeira, in R Aripuanã–R Machado interfluvium and along the west bank of R Roosevelt, in Amazonas, Rondônia and Mato Grosso states (Isler et al. 2007; Whitney et al. 2013). The southern range limit is unknown.
It inhabits the understorey of terra firme forest, including secondary and degraded forest, favouring gaps in the forest where sunlight come through and dense vegetation grows (Whitney et al. 2013). It feeds on insects.
It is not currently threatened by human activity, but the possible building of hydroelectric dams in the future may affect some watersheds in the area of the Aripuanã, Machado and Roosevelt rivers (Whitney et al. 2013), but the degree to which this may affect the species is unknown. Much habitat within the range current remains intact, however the 'Transamazonica' federal highway BR-230 dissects the distribution of the species and is undoubtedly opening up additional areas to deforestation for the development of agriculture.
It has been recorded in the Jaru Reserve (Fernandes 2013).
Text account compilers
Wheatley, H.
Contributors
Westrip, J.R.S.
Recommended citation
BirdLife International (2024) Species factsheet: Manicore Antwarbler Hypocnemis rondoni. Downloaded from
https://datazone.birdlife.org/species/factsheet/manicore-antwarbler-hypocnemis-rondoni on 26/12/2024.
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 26/12/2024.