A new mud-nesting fanged frog discovered in Namdapha Tiger Reserve has given scientists a remarkable new insight into amphibian diversity in Northeast India. Found deep inside the forests of Arunachal Pradesh, the newly identified species builds mud nests under leaf litter, a rare behavior among frogs.
The species was described by researchers Bitupan Boruah, N.V. Rajiv, Sourav Dutta, and Abhijit Das, and has been named Limnonectes motijheel after a forest wetland located inside the reserve.
New Mud-Nesting Fanged Frog Discovered With Rare Nesting Behavior
Unlike most frogs that lay eggs in water, this newly described species uses a very different breeding strategy.
Researchers said the frog constructs mud nests beneath leaf litter, and males call from these hidden chambers to attract mates.
Abhijit Das explained that visitors to Namdapha in April, or to Dehing Patkai in Assam, may hear an unusual call coming from the dark forest floor. However, spotting the frog is difficult because it calls from a self-made subterranean mud nest.
Field observations suggest males remain concealed inside mud pits, making the species especially hard to locate during surveys.
Motijheel Wetland Proves Rich Habitat for Amphibians
The species takes its name from Motijheel, a small wetland inside the evergreen forests of Namdapha Tiger Reserve.
According to the report, the site is a popular tourist trail and an exceptionally rich amphibian habitat. It supports the breeding of at least 10 species.
That makes the area an important location for both ecological research and biodiversity conservation.
Another Fanged Frog Recorded in India for the First Time
Alongside the new species discovery, researchers also reported the presence of Limnonectes longchuanensis in India for the first time.
While that frog was already known to science, it had not previously been documented in the country.
With these findings, the total number of Limnonectes species recorded in India has now reached six.
Namdapha Continues to Reveal Hidden Biodiversity
The discoveries were made during field surveys conducted between 2022 and 2023 in Namdapha, part of the Indo-Burma biodiversity hotspot.
This region is widely recognized for exceptional biodiversity, though much of it remains underexplored.
According to the study, the new species shows clear genetic and morphological differences from its closest relatives, confirming it as a distinct lineage.
Researchers said it currently appears restricted to Namdapha Tiger Reserve and nearby forest landscapes, though it may exist in adjoining areas as well.
Why Frog Discoveries Matter
Frogs are considered key indicators of ecosystem health, especially in forest and freshwater habitats.
The identification of a new species, along with a new national record, highlights how much biodiversity in Northeast India remains undocumented, particularly in overlooked forest floor and leaf-litter ecosystems.
In the forests of Namdapha, even a small mud nest can still hide a species unknown to science.
