I figured I would insert this little tidbit as a reference. This describes the twelve animals of the zodiac. Please keep in mind that the Narutoverse sometimes has different names for the animals as opposed to the actual animals on the Chinese zodiac. Just so you guys know ;)
Also, some of the abilities listed are not true. While some of them actually are true, I had to make some up, just because there simply wasn't any information on all of the animals.
So I hope you enjoy this little bit of information!
Rat: the animated animal
People born under this sign are sociable and talkative. In ninjutsu, the Rat sign gives motion to inanimate objects. Need an example? The Nara clan uses this sign for their shadow techniques.
Ox: the hard-working animal
People born under this sign are persistent and can stick to a task longer than others are capable of. In ninjutsu, the Ox sign is used for gathering strength and stamina to keep pushing forward.
Tiger: the leading animal
People born under this sign are fearless and known for their courage. In ninjutsu, the Tiger sign is most commonly affiliated with fire release techniques. Also, Kakashi Hatake used this sign for his One Thousand Years of Death technique.
Hare: the delicate animal
People born under this sign are sweet and kind toward others. In ninjutsu, the Hare sign is used for gathering chakra to feet and legs to increase speed and jumping abilities.
Dragon: the powerful animal
People born under this sign are known for their power and luck. In ninjutsu, the Dragon sign is used for completing seals.
Serpent: the seducing animal
People born under this sign are known for their charming personalities. In ninjutsu, the Serpent sign is most commonly associated with earth release techniques. One example is Deidara's clay style jutsu.
Horse: the active animal
People born under this sign are known for being active and popular. In ninjutsu, the Horse sign is used for healing others.
Ram: the elegant animal
People born under this sign are artistic, creative, and fond of nature. In ninjutsu, the Ram sign is used for spiritual purposes. The user's soul can be split or released to travel the area.
Monkey: the energetic animal
People born under this sign are cheerful beings filled with energy. In ninjutsu, the Monkey sign is most commonly associated with lightning release techniques.
Bird: the observant animal
People born under this sign are precise and accurate in everything they do. In ninjutsu, the Bird sign is used for channeling the elements that surround the ninja. This sign allows the user to harness the energies and elements, such as water, plants, etc., and use them in attacks.
Dog: the faithful animal
People born under this sign are honest and sincere. In ninjutsu, the Dog sign is most commonly associated with wind release techniques. An example would be Danzo's attacks during his fight with Sasuke.
Boar: the pure animal
People born under this sign are honorable, sincere, and tolerant beings. In ninjutsu, the Boar sign is most commonly affiliated with water release techniques.