Paa polunini (Smith, 1951) Nanorana polunini (common names: Langtang paa frog, Smith frog, Polunin's paa frog, Polunin's spiny frog) is a species of frog in the family Dicroglossidae.

[2][3] It is found in Nyalam County in southern Tibet (China), Nepal, and possibly Kashmir (India).

[2] It is a common species in Nepal but rare in China.

It lives in stream habitats in montane forest.

[1] Nanorana polunini are medium-sized frogs, attaining a snout–vent length of about 51 mm (2.0 in).