Indian scientists discover a new snake species and it was hiding in Mizoram all along

Sometimes, the biggest discoveries don’t arrive with drumrolls or headlines. They just sit there quietly, almost invisible, until someone looks a little closer. That’s exactly what happened in Mizoram, where scientists have now identified a brand-new species of reed snake that had been hiding in plain sight for years.


The snake is called Calamaria mizoramensis, named after the state it comes from. And the funny part? It’s not actually new-new. Researchers first collected specimens back in 2008. Back then, everyone assumed it was just another Southeast Asian reed snake. No one questioned it. No one thought twice. It took years, and better tools, to realise they were dealing with something else entirely.


The breakthrough came with a fresh round of research published in Zootaxa. Scientists mixed old-school methods, like studying body features and scale patterns, with modern DNA testing. That combination changed everything. HT Lalremsanga, a zoology professor at Mizoram University and the lead author of the study, said there was no hint at the time that the snake was special. But once the genetic data came in, the story shifted. The Mizoram snakes weren’t just a local variation. They were on their own evolutionary track.


To be sure, the team went back into the field. They collected samples from forested areas around Aizawl, Reiek, Sihphir and Sawleng, along with parts of Mamit and Kolasib districts. And the DNA results didn’t leave much room for doubt. The snake showed more than a 15 per cent genetic difference from its closest known relatives. In scientific terms, that’s a big gap. Big enough to confirm it’s a separate species.


For now, Calamaria mizoramensis has only been officially recorded in Mizoram. But researchers don’t think it’s limited to just one state. There’s a strong chance it also lives in neighbouring regions like Manipur, Nagaland and Assam. Some scientists even suspect it could extend into Bangladesh’s Chittagong region. But that’ll need more fieldwork to prove.


Globally, the Calamaria group includes 69 recognised species. Most of them are tiny, secretive snakes that spend a lot of time underground. They don’t slither into view very often, which is probably why so many of them stay under the radar for so long.


This newly identified snake is non-venomous and mostly active at night. It’s semi-fossorial, which is a fancy way of saying it likes to stay hidden under soil, leaves and forest debris. It prefers moist, forested hills and has been found at elevations between 670 and 1,295 metres. And interestingly, it doesn’t seem to mind humans too much. Some sightings have even been reported close to settlements, including inside the Mizoram University campus.


Because the snake has turned up in multiple locations and doesn’t appear to face immediate threats, researchers have provisionally listed it as ‘Least Concern’ under IUCN guidelines. But that label isn’t final. Scientists say more surveys are needed to really understand how many of these snakes are out there and how far they spread.


The discovery has also led to an update of Mizoram’s wildlife records. The state is now known to host 169 species of amphibians and reptiles combined - 52 amphibians and 117 reptiles, to be exact. That number alone says a lot about how rich, and still underexplored, the region is.


And maybe that’s the real takeaway here. Even today, in a country as studied as India, nature still has plenty of secrets. Some of them are small. Some are quiet. And some, like this little reed snake, have been waiting patiently for years to be seen for what they truly are.