Limnonectes kong has been described as the third creek frog (Limnonectes kuhlii-Group) from the Matang range of western Sarawak. The known distribution of the species currently covers low to mid-elevatino sites (10–400 m a.s.l.) at Santubong, Matang, Gading, and probably also Lanjak Entimau and Natuna Islands. The species inhabits small, potentially intermittant, creeks. At night, specimens were observed to sit in shallow water. Dehling & Dehling (2017) reported females that emit snarling, drawn-out, low-frequency calls that lasted between 0.5 and 3 seconds, while sitting in cavities along the creek's edge. 

Within the "kuhlii"-group, L. kong is a large, broad-headed species with incomplete webbing between toes, leaving two phalanges on Toe IV and 1.5 phalanges on Toes II and III free. Females grow to 52.5– 59.4 mm, males 57.7–76.3 mm in snout-vent-length. The fingers bear narrow, non-movable dermal fringes between fingers along both sides of phalanges (pre- and postaxial). The upper face of thigh and shank sparsely scattered with enlarged, oval tubercles. Adult size and webbing already distinguish it from the sympatric L. hikidai and L. conspicillatus (smaller in size and more extensive webbing in these). The tympanum is indiscernible in L. kong (vs. ususally discernible in L. conspicillatus and L. mocquardi). The images depicts a broad-headed, large male.

Tadpoles of L. kong resemble tadpoles of other members in the kuhlii-group in general shape and features but grow relatively large. Distinguishing characters among L. "kuhlii" tadpoles have not been established reliably. 

Dehling, J. M., & Dehling, D. M. (2017). A new wide-headed Fanged Frog of the Limnonectes kuhlii group (Anura: Dicroglossidae) from western Borneo with a redescription of Rana conspicillata Günther, 1872. Zootaxa, 4317(2), 291–19. http://doi.org/10.11646/zootaxa.4317.2.6