Select the snake family or subfamily and your current world region. If you don't know the family/subfamily, go to the "Find terrestrial snake by morphology (general)" page and follow the instructions.
Find terrestrial venomous snake by morphology (regional)
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Morphological identification key
| Viperinae |
Vipera sp. ("European vipers of the genus Vipera"). In Bulgaria, European Turkey and Greece (mainland) possibly also: Vipera xanthina. On the Greek islands Milos, Kimolos, Polynos and Siphnos: Macrovipera schweizeri. |