Deep inside Arunachal Pradesh’s Namdapha Tiger Reserve, scientists have uncovered a rare amphibian that is reshaping our understanding of biodiversity in Northeast India. The newly identified species, Limnonectes motijheel, commonly referred to as the “mud-nesting fanged frog,” is remarkable for its ability to construct underground cup-shaped nests beneath moist soil layers, hidden under thick evergreen forest leaf litter. This unusual nesting behaviour, combined with its distinctive fanged jaw, sets it apart from other amphibians and offers fresh insights into evolutionary adaptation and survival strategies.

The discovery was documented by researchers from the Wildlife Institute of India, who emphasize that such findings highlight the hidden diversity of amphibians in India’s northeast forests. Frogs of the Limnonectes group are typically medium-sized, ranging between 2.3 to 3.5 centimetres as adults, and this species is distinguished by a dark-brown line between its eyes and an inverted “V”-shaped ridge along its back. Scientists believe the fanged jaw may aid in feeding or territorial behaviour, adding to its scientific significance.

Named after Motijheel lake, the species underscores the ecological importance of Arunachal Pradesh’s wetlands and reinforces Namdapha Tiger Reserve’s reputation as a biodiversity hotspot. Researchers note that such discoveries are crucial for conservation planning and ecosystem understanding, as they expand global knowledge of amphibian diversity and adaptation.