BEWARE! Deadly snakes are on the move, threatening millions in previously safe regions with climate chang
Climate change is rapidly reshaping where venomous snakes are found across India, disrupting long-established hotspots and exposing new regions to potential danger. According to a pioneering study, areas that previously faced little to no snakebite risk may soon become vulnerable as warming temperatures push snake species into new habitats. At the same time, some currently high-risk zones may see reduced exposure as ecological conditions change. These shifts mark a major reorganisation of snakebite risk at the national scale and underline how strongly climate change influences wildlife movement and human safety. The findings highlight the urgent need for climate-aware public health planning as India prepares for evolving patterns of snake distribution in the coming decades.
Rising temperatures and rainfall changes are shifting snakebite risk zones in India
The latest findings show that India is likely to witness large-scale habitat changes among venomous snake species. According to the research team comprising experts in wildlife science, biology, and space applications, the projected rearrangement of snake species hotspots could reshape ecosystem services and intensify snakebite risk in many vulnerable zones. As habitats evolve under changing temperatures and rainfall patterns, snakes will be compelled to relocate to areas that better match their ecological needs.
The study emphasises that the range of the big four medically significant species is expected to shift in ways that heighten human snake interactions. Northern and central India appear particularly susceptible to increased encounters, creating a pressing need for public health systems to anticipate and adapt to this emerging challenge. These insights were published in the latest edition of Nature, a renowned peer-reviewed scientific journal.
How climate change is disrupting India’s wildlife
Among the many environmental challenges facing the world today, climate change remains a major threat to biodiversity. Rising temperatures and altered precipitation patterns often push species out of their established habitats, resulting in major distributional shifts and, in some cases, complete local or global extinctions. Venomous snakes, which are highly sensitive to environmental changes, are no exception.India’s rich biodiversity makes it particularly vulnerable. The country is home to more than 700 reptile species, nearly half of which are found nowhere else. Within this remarkable diversity, 285 species are snakes, including more than 40 terrestrial venomous species. These snakes form a crucial part of India’s ecosystems, yet they also pose a significant health risk, especially in rural regions.
How researchers predicted new snakebite risk areas
To understand how climate change may reshape the future landscape of venomous snakes, researchers modelled present and predicted distributions of snake hotspots under two climate scenarios for 2050 and 2070. These scenarios represent possible levels of future greenhouse gas concentrations and enable a clearer picture of how warming climates may influence snake dispersal.The team compiled 4,966 snake occurrence records from a wide range of sources, including citizen science portals, open access datasets, social media groups, and peer-reviewed studies. These entries were then refined and filtered down to 2,931 unique locations to ensure robust analysis. By using these data, the researchers were able to map the ecological niches of 30 venomous snake species and assess how their habitats may shift in response to projected climate change. The findings indicate that snakebite risk is likely to rise in several new regions of India. Northern India, including the Himalayan belt and the northeast, is projected to experience a noticeable increase in venomous snake presence. Southern elevated areas, particularly parts of the Western Ghats, may also become more prone to human snake interactions.These emerging hotspots highlight the broader consequences of shifting biodiversity under climate stress. As snakes move into cooler or more favourable habitats, human communities that have historically experienced few snake encounters may face new health challenges. The study stresses the importance of integrating climate-informed conservation measures with adaptive public health plans to minimise conflicts and reduce biodiversity loss.
India’s snakebite burden and the dominance of the big four
India currently records the world’s highest number of snakebite-related deaths. More than 50,000 fatalities occur annually, although the true numbers are likely much higher due to underreporting in remote and marginalised communities. Rural populations, in particular, bear the greatest burden because of frequent exposure to farmland and forest edges where snakes thrive.Much of this crisis is driven by four widespread species collectively known as the big four. These include the Common Krait, the Spectacled Cobra, Russell’s Viper, and the Saw-scaled Viper. They are ecologically resilient and thrive in human-dominated landscapes, which contributes to their dominance and the ongoing health risks they pose. Their adaptability ensures that they continue to coexist with expanding human settlements, making them a persistent concern for medical and public health authorities.