• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Justification of Red List category
This species has an extremely 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 of this species has not been quantified, but it is described as uncommon.

Trend justification
Data on rates of population decline are lacking, but extensive habitat loss has occurred throughout the species's range, suggesting that a moderately rapid and on-going decline is likely to be taking place.

Platysmurus aterrimus is resident in Borneo.

This species occurs in dense lowland evergreen forest, swampy woodland, tall secondary forest, forest edges and mangroves, up to 800 m.

Conservation Actions Underway
No targeted conservation actions are known for this species, although it occurs in a number of protected areas.

Conservation Actions Proposed
Conduct repeated surveys within the species's range to determine its current distribution and abundance, as well as assess population trends and rates of habitat loss. Conduct ecological studies to improve understanding of its precise habitat requirements, tolerance of secondary habitats and response to fragmentation. Effectively protect significant areas of suitable forest at key sites, in both strictly protected areas and community-led multiple use areas.

Text account compilers
Benstead, P., Gilroy, J., Taylor, J., Symes, A. & Derhé, M.

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Recommended citation
BirdLife International (2024) Species factsheet: Bornean Black Magpie Platysmurus aterrimus. Downloaded from https://datazone.birdlife.org/species/factsheet/bornean-black-magpie-platysmurus-aterrimus on 19/12/2024.
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 19/12/2024.