Cobras are a species of venomous snake that have specialized vertebrae that when extended, give them a "hood". Size and colorations vary from species to species.
Cobra.
cobra
corbra
Cobra
Most poisonous snake have fang.
The adder is also called a common viper.
the most poisonous is the beaked sea snake
could be a black rat snake. those are not poisonous. they are almost harmless. (other person) It could be a water mocasin. Those are highly poisonous to people. They are also called cottonmouths.
The only venomous snake native to the UK is the Adder (Vipera berus).
The word βdreadβ rearranged to mean a poisonous snake is: adder.
rattle snake
a venomous snake
cottonmouth snake