Two new species of viper have been discovered on the Tibetan Plateau, the Nujiang pit viper in Zayu in Tibet and the Glacier pit viper found west of the Nujiang River and Heishui in Kham [Ch: Sichuan], reports the Tibetan Journal. The Glacial pit viper is living at 4,800 metres above sea level: 2,000 metres higher than its normal habitat.