Aripuana Antwren Herpsilochmus stotzi


Justification of Red List Category
This recently-described 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.

Trend justification
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. The population is therefore suspected to be decreasing, but not yet at a rate that approaches the thresholds for classification as threatened.

Distribution and population

Herpsilochmus stotzi is found in central Amazonian Brazil on the right bank of the R. Madeira, in the interfluvium of the R. Aripuanã–R Machado and the R. Roosevelt (Whitney et al. 2013).


Text account compilers
Khwaja, N.

Recommended citation
BirdLife International (2019) Species factsheet: Herpsilochmus stotzi. Downloaded from on 24/09/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from on 24/09/2019.