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). The population trend appears to be fluctuating, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not 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
The overall population trend is fluctuating, although some populations are stable and others have unknown trends (Wetlands International 2006).
Text account compilers
Ekstrom, J., Butchart, S.
Recommended citation
BirdLife International (2024) Species factsheet: Australian Ibis Threskiornis moluccus. Downloaded from
https://datazone.birdlife.org/species/factsheet/australian-ibis-threskiornis-moluccus 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.