Unlucky Snake

Atractaspididae - Günther, 1858 - 12 - 64 - Burrowing asps - Africa and the Middle East.
Boidae - Gray, 1825 - 8 - 43 - Boas - Northern, Central and South America, the Caribbean, southeastern Europe and Asia Minor, Northern, Central and East Africa, Madagascar and Reunion Island, the Arabian Peninsula, Central and southwestern Asia, India and Sri Lanka, the Moluccas and New Guinea through to Melanesia and Samoa.
Bolyeriidae - Hoffstetter, 1946 - 2 - 2 - Splitjaw snakes - Mauritius.
Colubridae - Oppel, 1811 - 304 - 1938 - Typical snakes - Widespread on all continents, except Antarctica.