| Citation |
BirdLife International 2016. Ardeola bacchus. The IUCN Red List of Threatened Species 2016: e.T22697133A93600684. http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22697133A93600684.en. Downloaded on 23 September 2019. |
Description |
JUSTIFICATION
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). 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 may be moderately small to large, 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.
DESCRIPTION
The global population is estimated to number c.25,000-1,000,000 individuals (Wetlands International 2006), while national population sizes have been estimated at c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in China and < c.100 breeding pairs and c.50-1,000 individuals on migration in Korea (Brazil 2009).
Trend Justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats. |
