 The Viperidae (vipers) are a family of venomous snakes found in most parts of the world, with the exception of Antarctica, Australia, Hawaii, Madagascar, New Zealand, various other isolated islands, and north of the Arctic Circle.The common krait ("Bungarus caeruleus"), also known as Indian krait or blue krait) is a species of venomous snake of the genus "Bungarus" found in the jungles of the Indian subcontinent.It is a member of the "big four" species, inflicting the most snakebites on humans in India.