Интересные факты о гадюках
The common viper is the only venomous snake in Europe and Russia. This viper is called "an infernal snake" in Germany. The sting of this snake can be deadly. Its length reaches 35-50 cm. Distinctive feature of a viper is a dark zigzag onits back. Vipers have big roundish eyes. The viper isn't able to distinguish dangerous from safe - it rushes on all. It is a very agrassive snake.