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Common Viper - Vipera berus - Adder
Eurasia.
The following 4 subspecies are being recognized:
Vipera berus berus - West- and Central-Europe;
Vipera berus bosniensis - Balkan Peninsula;
Vipera berus nikolskii - Ukrain and Romania to Central-Russia;
Vipera berus sachalinensis - East-Asia.
Of this species there are no Zoo Photo's available.