vipera ursinii or meadow viper

adder anxiety bite danger dangerous european graeca greece greek iucn meadow meadowadder meadowviper mountains naturereserve poison poisonous poisonoussnake rare reptile reptileprotection russia scary serpent small snake snakebite snakepoison steppe thanatoid toxic ursinii venenate venomous venomoussnake viper vipera wild zoology