Bible Verses About Adder: A venomous serpent.

Dan will be a viper on the road, a horned snake in the path that bites the horse's heels so its rider falls off backward.

Their venom is like snake's venom; they are like a serpent that stops its ears,

You will tread down lions and snakes, young lions and serpents you will trample underfoot.

They have made their tongues as sharp as a snake's; viper's venom is under their lips. (Selah)

but in the end, it bites like a serpent -yes, it strikes like a poisonous snake.