| Citation |
BirdLife International. 2016. Coturnix japonica. The IUCN Red List of Threatened Species 2016: e.T22678949A95209097. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22678949A95209097.en. Accessed on 24 March 2022. |
Description |
JUSTIFICATION
This species is listed as Near Threatened because it is suspected to be undergoing a moderately rapid population decline, potentially owing to hunting and shifts in agriculture. Research is urgently required to establish population numbers, trends, and to assess and mitigate the threats to the species.
RANGE DESCRIPTION
Coturnix japonica breeds in eastern Asia, including northern Mongolia, Sakhalin Island and the Baikal and Vitim regions of Russia, north-eastern China, Japan, North Korea and South Korea. Some populations in Japan are resident, but most birds migrate south, wintering in southern China, Laos, Vietnam, Cambodia, Myanmar, Bhutan and north-eastern India (del Hoyo et al. 1994). There are also introduced populations in Italy and Hawaii (USA). No reliable population estimate exists, and although the species was previously considered to be fairly common in China (del Hoyo et al. 1994), declines appear to have occurred in Laos (Duckworth 2009) and Japan (Okuyama 2004, H. Nagata in litt. 2009), and there are fears that the species has undergone a significant decline overall (del Hoyo et al. 1994, Duckworth 2009).
DESCRIPTION
The global population size has not been quantified, but the species was has been reported to be fairly common (del Hoyo et al. 1994; Fuller et al. 2000). However, owing to recent suspected declines, the species is likely to be less common than previously thought. National population estimates include: c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in China; c.100-10,000 breeding pairs, c.50-1,000 individuals on migration and
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