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common viper Vipera berus; European adder Vipera berus; northern viper Vipera berus; common European viper Vipera berus; crossed viper Vipera berus | |||
common adder | |||
common viper | |||
vipera berus | |||
adder (Vipera berus); common European northern viper (Vipera berus); common northern viper (Vipera berus) |