The flight of birds is considered a bridge between the worlds (this world, earth, and water). Birds are also viewed as symbols of message bearers.
The bull symbolizes strong will.
The butterfly spans many cultures as a symbol of transformation, inspiration, and rebirth.
The cat represents the guardian of the otherworld.
The dog symbolizes loyalty and the strong bond of companionship felt between human and animal. Also to be considered good luck, the symbol of the dog was commonly found in Celtic art and decor.
The dolphin became a symbol of frienship, good luck, and intelligence. The appearance of the dolphins off the coast of Ireland urged the Celts to contemplate the sea, which was an unknown universe.
The dragon is a guardian of treasures. The Celtic dragon is also traditionally associated with military matters. It stands for armed forces and sometimes even becomes a hero.
The Celtic symbolism of the goose deals witho ur own migratory and transitory nature. The goose is also a strong symbol of hearth and home, returning to the same place each spring, so the symbol was displaced to encourage the safe return of the Celtic warrior.
Griffins (Part eagle and part lion) are the guardians and protectors of life. They remain loyal to their protection in the afterlife.
The salmon are associated with wisdom and prophesy.
Snakes are seen in Celtic symbolism as a multifaceted symbol that represents fertility, creation, and healing.
If you want me to go into more detail about any of these animals, or any animals not included, please comment!