In World of Warcraft when you go a Druid what animals are you able to shapeshift into, at the beginning your firsts transformation was a bear but now its a tiger, with the extra patches and games brought out i was wondering what all the animals where you could shapeshift into? Levels for the animals would be appreciated to if anyone knows?

Course here I'll help. All of the answers are right but you get them now at different levels.
Cat Form- Level 8 (ideal for leveling fast and your main form if you are soloing
Bear Form- Level 15 (this is ideal for tanking and dealing with multiple mobs sort of like a warrior or paladin)
Aquatic Form- Level 16 (title says all able to breathe underwater and swim faster than normal turning into a little swim thing)
Travel Form- Level 16 (turns into a cheetah sort of cat that enables you to be able to run faster than normal but not as fast as a mount which you get at level 20)
Flight Form- Level 60 (turns you into a bird like creature which enables you to fly. It is also cheaper than buying a mount from a flying trainer)
Swift Flight Form- Level 70 (enables you to fly faster)

Also talent shape shifts are:
Moonkin: Balance: Increases nature and arcane damage increased and decreases damage taken
Tree Of Life: Restoration: Increases healing done and Armour

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10 = Bear (warrior)
16 = Cheetah & Seal (for running fast or swimming fast)
20 = Cat (rogue)

40 = You have to pick the talents, Moonkin (mage) Balance
50 = You have to pick the talents, Tree (healer) Restoration

60 = Bird/Bat that can fly slowly. (cheap)
70 = Different bird/Bat that can fly fast. (expensive)

I don't play a druid, but you get:

Bear form
Cat form
Travel form (also a cat, but looks different from cat form)
Flight form (bird or bat)
Tree form (tree)
Water travel form (sea lion)
Moonkin

Not sure what levels but they're not just for looks, each one has a use.