Nanorana liebigii, also known as Sikkim paa frog, Liebig's paa frog, Liebig's frog, and spiny-armed frog, is a species of frog in the family Dicroglossidae. It is found in the Himalayas, specifically in Bhutan, southern Tibet (China), northern India, and Nepal. The specific name liebigii honours a certain Dr von Liebig Jr., likely referring to Justus von Liebig, German botanist and chemist.