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 stable, 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.
Population justification
The global population is estimated to number 100,000-1,000,000 individuals (Delaney and Scott 2006), while national population estimates include: c.100-10,000 breeding pairs in Taiwan, c.100-10,000 breeding pairs and < c.1,000 wintering individuals in Korea and c.100-100,000 breeding pairs in Japan (Brazil 2009).
Trend justification
The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
Text account compilers
Ekstrom, J., Butchart, S.
Recommended citation
BirdLife International (2024) Species factsheet: Pacific Reef-egret Egretta sacra. Downloaded from
https://datazone.birdlife.org/species/factsheet/pacific-reef-egret-egretta-sacra on 21/12/2024.
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 21/12/2024.