Vipera berus sachalinensis (Sakhalin Island adder[2] a.k.a. Sakhalin adder[3]) is a viper subspecies[4] endemic to Asia.[5] Like all other vipers, it is venomous.
It is found in the Russian Far East (Amur), China (Jilin), North Korea, and on Sakhalin Island.[5]
According to Schwarz (1936), the type locality is "Sachalin" (= Sakhalin Island, Russia).[1]
McDiarmid et al. (1999) follow Golay et al. (1993) and recognize V. b. sachalinensis as a subspecies of V. berus.[1] However, it has been considered a full species in recent literature.[5]
Vipera berus sachalinensis (Sakhalin Island adder a.k.a. Sakhalin adder) is a viper subspecies endemic to Asia. Like all other vipers, it is venomous.