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 population size is unknown, but the species is described as common to fairly common and locally abundant in Sumatra (del Hoyo et al. 2006).
Trend justification
There are no data on population trends, however remote sensing data indicate that forest loss within the range is occurring at a rate equivalent to c.4% over three generations (Global Forest Watch 2023, using data from Hansen et al. [2013] and methods disclosed therein). As a forest-dependent species the population is suspected to be in slow decline, tentatively placed here in the range 1-9% in three generations.
Forest loss is slow but ongoing in its range (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein) and likely to be causing only slow declines. The species has been recorded in the cage bird trade (Chng et al. 2018, Okarda et al. 2022) but not at a scale that is thought likely to be causing rapid population reductions.
Text account compilers
Vine, J.
Recommended citation
BirdLife International (2024) Species factsheet: Indigo Flycatcher Eumyias indigo. Downloaded from
https://datazone.birdlife.org/species/factsheet/indigo-flycatcher-eumyias-indigo 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.