| Citation |
BirdLife International. 2016. Cissa hypoleuca. The IUCN Red List of Threatened Species 2016: e.T22705813A94036926. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22705813A94036926.en. Downloaded on 26 July 2020. |
Description |
JUSTIFICATION
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.
DESCRIPTION
The global population size has not been quantified, but the species is reported to be locally not uncommon in Vietnam, rare in China and uncommon and very local in Thailand (Madge and Burn 1993).
Trend Justification: The population is suspected to be in decline owing to presumably ongoing habitat destruction on Hainan (Madge and Burn 1993). |
