| Citation |
BirdLife International. 2016. Phylloscopus ricketti. The IUCN Red List of Threatened Species 2016: e.T22715372A94450439. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22715372A94450439.en. Downloaded on 19 May 2020. |
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 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 rather local and thinly distributed (Baker 1997; G. Carey in litt. 2010), while the population in China has been estimated at c.100-10,000 breeding pairs and c.50-1,000 individuals on migration (Brazil 2009).
Trend Justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
HABITAT AND ECOLOGY
This species primarily inhabits forests, but it has also been recorded in open, somewhat degraded woodland and scrubland with scattered conifers, and in gardens and tea plantations adjacent to close-canopy secondary forest (P. Leader in litt. 2007, G. Carey in litt. 2010). It may inhabitat a fairly narrow altitudinal range (800-1,100 m) (G. Carey in litt. 2010). |
