LC
Grey-backed Thrush Turdus hortulorum



Justification

Justification of Red List Category
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 is not known, but the population is not believed to be decreasing sufficiently rapidly to approach the thresholds 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.

Population justification
The global population size has not been quantified, but the species is described as common during the breeding season in Russia and China, rare in North Korea, uncommon and local in South Korea, common to abundant in Hong Kong outside of the breeding season and uncommon to fairly common in Vietnam outside the breeding season (del Hoyo et al. 2005). National population estimates include: c.10,000-100,000 breeding pairs and c.50-10,000 individuals on migration in China; c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Korea and c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Russia (Brazil 2009).

Trend justification
The population trend is difficult to determine because of uncertainty over the impacts of habitat modification on population sizes.

Acknowledgements

Text account compilers
Ekstrom, J., Butchart, S.


Recommended citation
BirdLife International (2022) Species factsheet: Turdus hortulorum. Downloaded from http://www.birdlife.org on 23/01/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/01/2022.