Snakes in Bangladesh

Bangladesh has 75+ snake species recorded in our database, 30 of them venomous. The great majority of species are non-venomous, which means most snakes a person encounters here pose no medical threat at all. The country sits on the Bengal delta, one of the most water-rich landscapes in Asia, and that geography is the main reason its snake fauna is so varied.

The diversity is driven by a wide mix of habitats packed into a small area. The Sundarbans mangrove forest along the southern coast, the floodplains and wetlands of the Ganges, Brahmaputra, and Meghna river systems, the hill forests of the Chittagong region in the southeast, and the dense human farmland in between each support different snakes. Wet rice paddies and irrigation channels concentrate frogs and rodents, which in turn concentrate the snakes that hunt them, so snakes and people frequently share the same ground.

The medically important venomous snakes of Bangladesh fall into a few well-established groups. The elapids include cobras (the spectacled cobra and the monocled cobra) and the king cobra in forested areas, along with several kraits, which are small, banded, highly venomous snakes that are active at night. The vipers include Russell's viper, a thick-bodied snake responsible for many serious bites across South Asia, and pit vipers such as green tree vipers in the hill forests. Along the coast and in the Bay of Bengal there are also venomous sea snakes. There are no mambas, no New World coral snakes, and no rattlesnakes in Bangladesh, as those groups do not occur in this part of the world.

The non-venomous majority is what most people actually see. Rat snakes, which grow long and fast and are common around farms and villages, the Indian and Burmese pythons, which kill by constriction rather than venom, a range of water snakes in the wetlands and the Sundarbans, wolf snakes, kukri snakes, and many small ground-dwelling species make up the bulk of the country's 80 recorded species. The Burmese python in particular is one of the largest and most famous snakes of the region.

Snakes are valuable to Bangladesh's ecology and economy. Rat snakes and many other species feed heavily on rats and mice that would otherwise destroy stored grain and standing rice crops, providing natural pest control that protects food supplies. In the wetlands and mangroves snakes help keep populations of frogs, fish, and small animals in balance, and they are themselves prey for birds and larger predators. Killing snakes on sight removes a free and effective check on rodent populations.

Honest safety framing matters. Most snakes in Bangladesh are harmless, and the main medical threats are the cobras, kraits, and Russell's viper. The correct response to a venomous bite is hospital care and antivenom, given by trained medical staff, not home treatment. No wild venomous snake is ever safe to handle, even one that looks calm or appears dead, and the safest action around any unknown snake is to keep your distance and leave it alone. If a bite happens, treat it as an emergency and get to medical care immediately. In the United States contact Poison Control at 1-800-222-1222; elsewhere call your local emergency services.