asp
fer-de-lance
Bothrops atrops
bushmaster
cerastes
horned asp
Cerastes cornutus
horned viper
sand viper
adder
carpet viper
river jack
western diamondback rattlesnake
Russell's viper
viperid
common viper
Vipera berus
gaboon viper
Bitis gabonica
viperine
Nikolsky's viper
Gaboon
Gaboon viper
lebectin
viperish
viper
ticpolonga
hornsman
rinkhals
genus Cerastes
viperess
viperling
Hemachatus haemachatus
genus Aspis
ringhals
Aspis
spitting snake
sarafotoxin
ammodytin
copperhead
shore pit viper
Agkistrodon contortrix
viperous
black snake
taipan
Oxyuranus scutellatus
Bitis arietans
pilot snake
horned snake
puff adder
viperlike
bothropoid
elapid
leaf-nosed snake
jararacussin
bothrombin
temple viper
cobra
elapid snake
venomoid
convulxin
jararacussu
cottonmouth
three-step snake
Agkistrodon piscivorus
water moccasin
nigroviriditoxin
ancrod
mamushi
mamba
cottonmouth moccasin
night adder
falx
Acanthophis antarcticus
twig snake
ringed snake
death adder
ring snake
habu
Natrix natrix
grass snake
family Crotalidae
butterfly adder
Crotalidae
bothropic
Boettger's two-headed snake
Mexican west coast rattlesnake
viperoid
daboia
aspic
coral snake
surucucu
Old World coral snake