Snakes

Proverbs 23:32 - At the last it biteth like a serpent, and stingeth like an adder.
Micah 7:17 - They shall lick the dust like a serpent, they shall move out of their holes like worms of the earth: they shall be afraid of the LORD our God, and shall fear because of thee.
Matthew 10:16 - Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves.
Mark 16:18 - They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover.
Luke 10:19 - Behold, I give unto you power to tread on serpents and scorpions, and over all the power of the enemy: and nothing shall by any means hurt you.
John 3:14 - And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up:
2 Corinthians 2:11 - Lest Satan should get an advantage of us: for we are not ignorant of his devices.