Wild animals seen in Mount Qomolangma National Nature Reserve in Tibet

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Blue sheep are seen in Mount Qomolangma National Nature Reserve in southwest China's Tibet Autonomous Region, April 29, 2020. (Xinhua/Purbu Zhaxi)

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A great rosefinch is seen in Mount Qomolangma National Nature Reserve in southwest China's Tibet Autonomous Region, May 2, 2020. (Xinhua/Purbu Zhaxi)

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A snow leopard is seen in an undated infrared photo taken in Mount Qomolangma National Nature Reserve in southwest China's Tibet Autonomous Region. (Xinhua)

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A Tibetan snowcock is seen in Mount Qomolangma National Nature Reserve in southwest China's Tibet Autonomous Region, April 28, 2020. (Xinhua/Jigme Dorje)

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A Tibetan snowcock is seen in Mount Qomolangma National Nature Reserve in southwest China's Tibet Autonomous Region, April 28, 2020. (Xinhua/Jigme Dorje)

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Yellow-billed choughs are seen in Mount Qomolangma National Nature Reserve in southwest China's Tibet Autonomous Region, April 28, 2020. (Xinhua/Purbu Zhaxi)