Nanorana unculuanus

{{Short description|Species of amphibian}}

{{Speciesbox

| image =

| status = VU

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=IUCN SSC Amphibian Specialist Group |date=2020 |title=Nanorana unculuanus |volume=2020 |page=e.T58248A63851279 |doi=10.2305/IUCN.UK.2020-2.RLTS.T58248A63851279.en |access-date=16 November 2021}}

| taxon = Nanorana unculuanus

| authority = (Liu, Hu, and Yang, 1960)

| synonyms = Rana unculuanus Liu, Hu, and Yang, 1960

Chaparana unculuanus (Liu, Hu, and Yang, 1960)

Paa unculuanus (Liu, Hu, and Yang, 1960)

}}

Nanorana unculuanus (common names: Yunnan Asian frog) is a species of frog in the family Dicroglossidae.

It is endemic to central and southern Yunnan, China, although it is expected to have wider distribution than currently known, possibly extending into Vietnam.{{cite web |url=http://research.amnh.org/vz/herpetology/amphibia/Amphibia/Anura/Dicroglossidae/Dicroglossinae/Nanorana/Nanorana-unculuanus |title=Nanorana unculuanus (Liu, Hu, and Yang, 1960) |author=Frost, Darrel R. |year=2014 |work=Amphibian Species of the World: an Online Reference. Version 6.0 |publisher=American Museum of Natural History |access-date=23 January 2014}}

Its natural habitats are fast-flowing hill streams and riparian habitats in forests and grasslands, but also man-made habitats like roadside drainage ditches and ponds. It is a rare and secretive species that appears to be declining. It is currently threatened by collection for food and also by habitat loss.

Nanorana unculuanus are medium-sized frogs: males grow to a snout–vent length of about {{convert|76|mm|abbr=on}} and females to {{convert|79|mm|abbr=on}}. Tadpoles are up to {{convert|35|mm|abbr=on}} in length.{{cite book |title=Atlas of Amphibians of China |last=Fei |first=L. |year=1999 |publisher=Henan Press of Science and Technology |location=Zhengzhou | language = zh |isbn=7-5349-1835-9 |page=222}}