Unlucky Snake

Colubridae - Oppel, 1811 - 304 - 1938 - Typical snakes - Widespread on all continents, except Antarctica.
Cylindrophiidae - Fitzinger, 1843 - 1 - 8 - Asian pipe snakes - Sri Lanka east through Myanmar, Thailand, Cambodia, Vietnam and the Malay Archipelago to as far east as Aru Islands off the southwestern coast of New Guinea. Also found in southern China (Fujian, Hong Kong and on Hainan Island) and in Laos.
Elapidae - Boie, 1827 - 61 - 235 - Elapids - On land, worldwide in tropical and subtropical regions, except in Europe. Sea snakes occur in the Indian Ocean and the Pacific.
Loxocemidae - Cope, 1861 - 1 - 1 - Mexican burrowing snake - Along the Pacific versant from Mexico south to Costa Rica.