Wolves/Shapeshifters: They are known as wolves but are actually shapeshifters because in Breaking Dawn Part 2, at the last part when the Volturi interfered, they didn't get angry with the werewolves because the 'werewolves' are actually shapeshifters. The volturi have encountered with werewolves before and they are real wolves but Sam and his pack are shapeshifters because they can change from Humans to Wolves and from Wolves back to Human forms. :)
Sam Uley: Pure black fur
The Alpha of the pack (though not by blood) and the oldest, he was the first to phase and experience imprinting. It caused him to loose his high school sweeatheart, Leah Clearwater, and gain his 'other half', Emily Young, Leah's cousin. Leah was heartbroken, Emily was angry at first, but couldn't reject his commitment, and Sam has to look into Leah's eyes every day and see what he had done.
Jacob Black: Reddish-brown fur
He has the true blood line of the Alpha, but doesn't take on that position until later on when he has to choose between his pack duties and Bella Swan's life. Starting as just an old childhood friend of Bella, their relationship grows when Edward Cullen leaves and he begins to love her deeply. He hates the Cullen's for they did to Bella, and the fact that werewolves and vampires are natural enemies. Bella realizes that she is in love with Jacob, too, but she still has her love for Edward. Jacob later imprints on Bella and Edward's daughter, Renesmee, who is half vampire, half human.
Quil Ateara: Chocolate-brown fur
He is Jacob Black's 'wingman', and doesn't join the pack until later on when Victoria is trying to kill Bella Swan. He is also one of the members who imprinted. Unlike most of the pack, he was exeptionally happy to become a werewolf mostly because he was able to be with his friends again. He imprinted on Emily Young's two-year old cousin, Claire. Yet there is nothing romantic about it, and, since werewolves don't age until they give up their wolf, he will be whatever Claire needs while growing up, from a friend to a lover.
Embry Call: Gray fur w/ darks spots on back
Another one of Jacob Black's 'wingmen', Embry's mother was a women of the Makah tribe, not the Quileute's. Since the werewolf traits are inherited, it means that he is a half-brother to either Jacob Black, Sam Uley, or Quil Ateara. This causes a bit of stress in the pack.
Paul: Dark gray fur
The most expected to burst into a wolf from his short temper, Paul is the most volatile of the pack members. When Jacob Black told Bella Swan about the secret werewolves, Paul becomes so enraged that he phases and tries to attack Bella. Later on, he seems to have better control of his temper, and imprints on Jacob's older sister, Rachel. Although Jacob and his father, Billy Black, are annoyed by Paul's constant presense at their house, Billy is happy to have his daughter around more.
Jared:
One of the largest wolves, he was the second to phase. He imprinted on a girl he sits next to in class, Kim. Before his first phase, he never looked at her twice. Now, after he was a werewolf, he looked at her once and never looked away.
Leah Clearwater: Light gray fur
Being heartbroken by Sam Uley for leaving her for her second-cousin, Emily Young, she is very bitter and negative. She is the only female werewolf in history for the Quileute wolves, and she torments the pack by thinking about things the rest of them would not like to know. She is very arrogant about the fact that she is the fastest wolf, being a girl. Though when Jacob Black leaves Sam Uley's pack, Leah joins him with her younger brother, Seth. Jacob and Leah's relationship begins to grow into a trusted comradship. Although she has a theory that she is possibly menopausal, her attitude towards everyone lightens and she becomes less troubling.
Seth Clearwater: Sandy brown-colored fur
Leah Clearwater's younger brother, he stays with Edward Cullen and Bella Swan during the fight against the newborn vampires. When Victoria and Riley appear, Seth fights and defeats Riley with Edward. Every since then, he's grown an unlikely friendship with Edward, and is the only werewolf who is not at all bothered by being surrounded by the Cullens. Seth is said to have pure and honest thoughts by Edward, making him endeared to the Cullens. He joins Jacob Black's pack along with Leah, and is Jacob's second-in-command, until replaced by his sister.
Collin:
Brady:
One of the youngest werewolves in the pack, thirteen, he becomes a part of Sam Uley's pack due to the Volturi coming
Credit for definitions of each type of shapeshifter:
http://wiki.answers.com/Q/Who_is_in_the_Quileute_wolf_pack_in_the_twilight_series
