Snakes - Satan entered a snake for the purpose of deceiving Eve, and ever since the creatures have been associated with the devil as a symbol of evil power.
Their mysterious nocturnal nature has long associated owls as the messengers of sorcerers. In Christian symbolism, the owl stands for the devil and is considered an evil omen.
While the the fox is depicted usually as a cunning trickster, the animal is rarely regarded as evil. But it can't be trusted.
In Greek mythology, the fearsome Minotaur was a monster of Crete that had the body of a man and the head of a bull.
Hyenas - In Europe during the Middle Ages, bestiary texts adopted the hyena as a symbol for the devil's dark deeds.
Despite being possessed of a melodic song, its mere color suggested to many that the blackbird was related to witches, mystics, and magic.
Frogs, like toads, are included in Satanism and black magic rituals. In the Book of Revelation, frogs are depicted as "unclean spirits of demons" (Rev. 16: 13-14).
It's said that when a rooster crows at night, the annoying shriek symbolizes death or imminent danger.
Generally considered to be a sign of decay and death, maggots also represent corruption of the soul, mortality, and evil.
In some cultures, the devil is believed to take the form of a cockroach.
Pale horses -
While not a manifestation of evil as such, a pale horse as a representation of Death appears in the Bible and associated literature.
Far from being man's best friend, the dog has been associated with the devil's pets—an animal linked with death.