Children (47 direct children, 69 direct and indirect children):
Vipera darevskii
Darevsky's viper
Adder
(tree size 3)
Vipera berus
Vipera ursinii
(tree size 2)
Orsinis viper
Aspic viper
(tree size 5)
Asp viper
Vipera ammodytes
(tree size 5)
Nose-horned viper
Vipera pontica
Black sea viper
Vipera monticola
Atlas dwarf viper
Vipera barani
Vipera latastei
(tree size 2)
Lataste's viper
Vipera nikolskii
Nikolsky's viper
Vipera dinniki
Dinnik's viper
Vipera kaznakovi
Caucasian viper
Vipera seoanei
(tree size 1)
Seoane's viper
Vipera lotievi
Lotiev's viper
Vipera renardi
(tree size 3)
Vipera eriwanensis
(tree size 1)
Armenian steppe viper
Vipera transcaucasiana
Transcaucasian long-nosed viper
Vipera orlovi
Orlov's viper
Vipera altaica
Vipera magnifica
Magnificent viper
Vipera olguni
Vipera shemakhensis
Vipera albicornuta
Vipera anatolica
Vipera antiqua
Vipera ebneri
Iranian mountain steppe viper
Vipera latifii
Vipera walser
Russell's viper
Vipera russellii
Vipera graeca
Vipera russelii
Vipera sp.
Vipera raddei
Vipera hugyi
Vipera latasti
Vipera xanthina
Vipera bornmuelleri
Vipera hindii
Vipera chlorechis
Vipera superciliaris
Vipera arietans
Vipera cornuta
Vipera heraldica
Vipera rhinoceros
Vipera caudalis
Vipera schneideri
Vipera psyches