Reeves' Pond Turtleクサガメ

Mauremys reevesiiEN— Endangered

Reeves's turtle, known in Japan as kusagame, is a semiaquatic pond turtle native to Korea and eastern China, with long-established but likely introduced populations in Japan and Taiwan. Mature males undergo dramatic melanism, turning almost entirely black, while juveniles are marked by distinctive yellow shell seams. Once common and still farmed by the millions in China for food, medicine, and the pet trade, the species is now classified as Endangered by the IUCN due to overharvesting, habitat loss, and competition from invasive red-eared sliders.

Reeves' Pond Turtle (reference photo)
Photo: Dinkun Chen / CC BY-SA 4.0 / Source / cropped

Species Data

Classification
Testudines / Geoemydidae Source
Distribution
Native to Korea and eastern to southeastern China; populations in Japan and Taiwan are believed to derive from historical human introductions rather than natural range. Source

Did You Know?

  • Juveniles often have yellow seams along their carapace scutes, giving rise to the alternate Japanese name "golden-line turtle." Source
  • Mature males over about 7 years old often undergo melanism, turning almost entirely black—including the eyes—and losing their juvenile markings. Source
  • It has musk glands at the base of its limbs and releases a foul odor as a defense mechanism when threatened. Source

Where to See This Species

5 facilities · 0 individuals

ごかつら池どうぶつパーク (Gokatsuraikedoubutsu Park)Mie勢和多気ICから約10分。

ごかつら池どうぶつパークのWikipedia記事に飼育種として記載 Source

京都市動物園 (Kyoutoshi Doubutsuen)KyotoOpened in 1903

京都市動物園のWikipedia記事に飼育種として記載 Source

桐生が岡動物園 (Kiryuugaoka Doubutsuen)Gunma自動車の場合、カーナビ検索は「桐生が岡動物園」ではなく「桐生が岡遊園地」で設定すると駐車場に到着できる(動物園名で検索すると誤った経路になる場合がある)。

桐生が岡動物園のWikipedia記事に飼育種として記載 Source

東京都恩賜上野動物園 (Toukyoutoonshiueno Doubutsuen)TokyoOpened in 1882

東京都恩賜上野動物園のWikipedia記事に飼育種として記載 Source

飯田市立動物園 (Iida Shiritsu Doubutsuen)Nagano

飯田市立動物園のWikipedia記事に飼育種として記載 Source

Conservation Story

Conservation Status

IUCNではEN。原産地では採捕、取引、生息地の破壊などが脅威です。

Habitat

沼、池、浅い流れ、水路などの淡水域。

Threats

Conservation & Breeding Efforts

Sources

en.wikipedia.org

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FAQ

Is the Reeves's turtle native to Japan?
Most evidence suggests it is not originally native—Japanese populations are believed to descend from turtles introduced from the Korean Peninsula, though the exact timing remains debated. Source
Why do male Reeves's turtles turn black?
Males over roughly 7 years old commonly develop melanism, a condition in which the body, including the eyes, darkens to almost solid black and the juvenile pattern disappears. Source
Why is the Reeves's turtle endangered?
Wild populations have declined sharply due to overharvesting for food and traditional medicine, pet-trade capture, habitat loss, and competition with invasive red-eared sliders, leading the IUCN to list it as Endangered. Source

Source: ja.wikipedia.org en.wikipedia.org