| Citation |
BirdLife International. 2017. Ficedula narcissina (amended version of 2016 assessment). The IUCN Red List of Threatened Species 2017: e.T103769227A111166648. https://dx.doi.org/10.2305/IUCN.UK.2017-1.RLTS.T103769227A111166648.en. Downloaded on 30 May 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). 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 species is described as common or locally abundant on Sakhalin Island, and common and widespread throughout most of Japan (del Hoyo et al. 2006). There are an estimated 100-100,000 breeding pairs in Russia and 10,000-100,000 breeding pairs in Japan (Brazil 2009). This puts the species global population as c.20,000-400,000 mature individuals. We precautionarily place it in the band 20,000-49,999 mature individuals.
Trend Justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats. |
