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
corbra
Cobra
Most poisonous snake have fang.
No, the black rat snake is not poisonous.
the most poisonous is the beaked sea snake
The adder is also called a common viper.
The only venomous snake native to the UK is the Adder (Vipera berus).
rattle snake
a venomous snake
cottonmouth snake
Water Moccasins are a poisonous snake. A very aggressive snake as well.