# Tonkin frog

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The **Tonkin frog** (***Odorrana bacboensis***) is a species of [frogs](/source/Frog) in the family [Ranidae](/source/Ranidae). It is found in northern [Vietnam](/source/Vietnam) and in adjacent southern [China](/source/China) ([Yunnan](/source/Yunnan) and [Guangxi](/source/Guangxi) provinces).[2][3] The [specific name](/source/Specific_name_(zoology)) is derived from *Bac Bo*, the Vietnamese name for northern Vietnam, as the species was first [described](/source/Species_description) from there.[1]

## Description

Male Tonkin frogs measure 36–55 mm (1.4–2.2 in) (based on just two specimens) and females 78–105 mm (3.1–4.1 in) in snout–vent length.[1][3] Skin on the [dorsum](/source/Dorsum_(anatomy)) is shagreened with heavy granulations. The dorsum, flanks, and loreal region are brown with small black spots that get larger on the flanks. The upper and lower lips are creamy yellow with vertical black bars. The venter is creamy white, sometimes with light spotting. The [iris](/source/Iris_(anatomy)) is golden, and the margin of pupil has a striking yellow and red border.[1]

## Reproduction

This species probably breeds in the autumn. The male has [gular pouches](/source/Gular_pouch), but the call is unknown. Unusually, the eggs are black, indicating that they are laid in places where they are exposed to sunlight to promote development.[1]

## Habitat

Natural [habitats](/source/Habitat) are forested montane river systems.

## References

1. Bain, R. H.; Lathrop, A.; Murphy, R. W.; Orlov, N. L.; & Ho, T. C. (2003). ["Cryptic species of a cascade frog from Southeast Asia: taxonomic revisions and descriptions of six new species"](https://zenodo.org/record/4734880). *American Museum Novitates*. '***(3417): 1–60. [doi:10.1206/0003-0082(2003)417<0001:CSOACF>2.0.CO;2](https://doi.org/10.1206/0003-0082(2003)417%3C0001:CSOACF%3E2.0.CO;2). [hdl:2246/2846](https://hdl.handle.net/2246/2846). [S2CID 83664182](https://api.semanticscholar.org/CorpusID:83664182)***

1. Frost, Darrel R. (2016). ["*Odorrana bacboensis* (Bain, Lathrop, Murphy, Orlov, and Ho, 2003)"](http://research.amnh.org/vz/herpetology/amphibia/Amphibia/Anura/Ranidae/Odorrana/Odorrana-bacboensis). *Amphibian Species of the World: an Online Reference. Version 6.0*. American Museum of Natural History. Retrieved 1 April 2016.

1. Wang, Ying-Yong; Lau, Michael Wai-Neng; Yang, Jian-Huan; Chen, Guo-Ling; Liu, Zu-Yao; Pang, Hong; & Liu, Yang (2015). "A new species of the genus *Odorrana* (Amphibia: Ranidae) and the first record of *Odorrana bacboensis* from China". *Zootaxa*. **3999** (2): 235–254. [doi:10.11646/zootaxa.3999.2.4](https://doi.org/10.11646/zootaxa.3999.2.4). [PMID 26623573](https://pubmed.ncbi.nlm.nih.gov/26623573)

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