The following is a list of snakes in Bangladesh of South Asia, primarily covering the region covered by mainland Bangladesh, India, Pakistan, Nepal, Sri Lanka, Bhutan, parts of Myanmar and the Andaman and Nicobar Island chains. All families are covered except for the Colubridae which is found here. This forms part of the complete list of reptiles of South Asia. India and Bangladesh in particular have the highest number of snake species in the world.
Family Typhlopidae in Bangladesh:
Brahminy Blind Snake (Ramphotyphlops braminus) Bangladesh, Bhutan, India, Nepal, Pakistan, Sri Lanka.
Slender blind snake (Typhlops porrectus) Pakistan, India, Bangladesh, Sri Lanka .
Giant blind snake (Typhlops diardii) Northeast India, Bangladesh, China, Indo-China, Myanmar, Thailand, Malay region.
Family Boidae in Bangladesh:
Common sand boa Gongylophis conicus Pakistan, India, Bangladesh, Sri Lanka
Indian rock python Python molurus Pakistan, India, Nepal, Bhutan, Bangladesh, Sri Lanka, Myanmar, Thailand, China, Hong Kong, Taiwan, Java
Family Elapidae in Bangladesh:
Common Indian krait Bungarus caeruleus Pakistan, India, Nepal, Bangladesh, Sri Lanka.
Banded krait Bungarus fasciatus Bangladesh, India, Nepal, Myanmar, Thailand, Indo-China, China, Malay region.
Monocled cobra Naja kaouthia Bangladesh, India, Myanmar, Thailand, Indo-China, China.
Spectacled cobra Naja naja Pakistan, India, Nepal, Bangladesh, Sri Lanka.
King cobra Ophiophagus hannah India, Nepal, Pakistan, Bangladesh, Myanmar, Thailand, China, Indo-China, Malay region, Philippines.
Family Hydrophiidae in Bangladesh:
Yellow-and-black sea snake Atretium schistosum India, Bangladesh, Nepal, Sri Lanka.
Beaked Seasnake or Hook-nosed sea snake Enhydrina schistosa (Daudin, 1803) Persian Gulf, Pakistan, India, Sri Lanka, Bangladesh, Indo-China, Malay peninsula.
Blue sea snake Hydrophis caerulescens Shaw, 1802 Pakistan, India, Bangladesh, China, Malay region.
Black-banded sea snake Hydrophis nigrocinctus India, Bangladesh, Sri Lanka, Myanmar.
Estuarine sea snake Hydrophis obscurus India, Bangladesh, Sri Lanka, Myanmar.
Cochin banded sea snake Hydrophis ornatus Persian Gulf, Pakistan, India, Bangladesh, Sri Lanka, Malay region, Indo-China, China.
Annulated sea snake Leioselasma cyanocincta Persian Gulf, Pakistan, India, Sri Lanka, Bangladesh, Malay region.
Slender narrow-headed sea snake Microcephalophis gracilis Pakistan, India, Sri Lanka, Bangladesh, Malay region, China.
Family Viperidae in Bangladesh:
Russel's viper Daboia russelii Pakistan, India, Bangladesh, Sri Lanka, Myanmar, Thailand, China, Indo-China, islands of Java, Komodo, Flores, Indonesia .
Indian saw-scaled viper Echis carinatus Pakistan, India, Nepal, Bangladesh, Sri Lanka.
Blotched pit viper Ovophis monticola Bangladesh, India, Nepal.
Brown spotted pit viper Protobothrops mucrosquamatus India, Bangladesh, China, Myanmar, Vietnam.
White-lipped pit viper Trimeresurus albolabris India, Nepal, Bangladesh, China, Myanmar, Thailand, Sumatra, Java, Lesser Sundas up to Timor.
Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes that can be distinguished from legless lizards by their lack of eyelids and external ears. Like all squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with many more joints than their lizard ancestors, enabling them to swallow prey much larger than their heads with their highly mobile jaws. To accommodate their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side, and most have only one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca.
Living snakes are found on every continent except Antarctica, in the Pacific and Indian Oceans, and on most smaller land masses — exceptions include some large islands, such as Ireland and New Zealand, and many small islands of the Atlantic and central Pacific. More than 20 families are currently recognized, comprising about 500 genera and about 3,400 species. They range in size from the tiny, 10 cm-long thread snake to the Reticulated python of up to 8.7 meters (29 ft) in length. The fossil species Titanoboa cerrejonensis was 15 meters (49 ft) long. Snakes are thought to have evolved from either burrowing or aquatic lizards during the mid-Cretaceous period, and the earliest known fossils date to around 112 Ma ago. The diversity of modern snakes appeared during the Paleocene period (c 66 to 56 Ma ago). The oldest preserved descriptions of snakes can be found in the Brooklyn Papyrus.
Most species are nonvenomous and those that have venom use it primarily to kill and subdue prey rather than for self-defense. Some possess venom potent enough to cause painful injury or death to humans. Nonvenomous snakes either swallow prey alive or kill by constriction.