![](http://www.ecns.cn/hd/2023/02/14/36bfc88348684f70b84ce059e6c8654f.jpg)
An endangered red-spotted toothed toad (Oreolalax rhodostigmatus) is found during a scientific research at a 800-meter-deep cave of Wulong Karst National Geology Park, a UNESCO World Heritage Site, in Chongqing. (Photo: China News Service/Zhao Fengying)
Red-spotted toothed toad is endemic to central and south central China and lives in limestone caves in karst areas between 900 and 2,000 meters above sea level.
![](http://www.ecns.cn/hd/2023/02/14/1791345413bd4cf18e3f412c50924963.jpg)
An endangered red-spotted toothed toad (Oreolalax rhodostigmatus) is found during a scientific research at a 800-meter-deep cave of Wulong Karst National Geology Park, a UNESCO World Heritage Site, in Chongqing. (Photo: China News Service/Zhao Fengying)
![](http://www.ecns.cn/hd/2023/02/14/726d511634714c86aec82c9253f9b3d0.jpg)
Experts carry out scientific research at a 800-meter-deep cave of Wulong Karst National Geology Park, a UNESCO World Heritage Site, in Chongqing.
![](http://www.ecns.cn/hd/2023/02/14/255daa04e2094251936794c6902cb0f0.jpg)
An expert carries out scientific research at a 800-meter-deep cave of Wulong Karst National Geology Park, a UNESCO World Heritage Site, in Chongqing. (Photo: China News Service/Zhao Fengying)
![](http://www.ecns.cn/hd/2023/02/14/64dcff60bde84be0b9e28208f065916b.jpg)
An expert carries out scientific research at a 800-meter-deep cave of Wulong Karst National Geology Park, a UNESCO World Heritage Site, in Chongqing. (Photo: China News Service/Zhao Fengying)