Animals in Celtic and Welsh mythology are tied in with fertility and vitality, because they are living, moving, and growing. They also provide vitality and continued life for the tribes through their meat, skins, and bones. In addition, they are a connection to the realm of spirits and the gods. This connection is seen through their use in the hunt, search for secrets and wisdom.
Specific animals have specific associations depending on the characteristics of the type of animal.
Birds, fish, serpents, deer, cattle, swine, and so on all tend to be used as symbols. Boars , fishes , serpents , birds , and herd animals are the most frequently described. Their appearance in dreams and visions also indicates warriors. Great importance is attached to the bristles of the boar. Perhaps they are the distinguishing characteristic of the animal or symbolize its strength.