What are all the animal forms that a druid can turn into in world of warcraft?

And do you learn the skills to transform into them from a trainer?
What levels do you have to be to be able to turn into each of the animals?

Note: all Druid forms provide immunity to polymorph effects, and shape shifting removes all polymorph and movement impairing effects.

Bear Form: www.wowhead.com/?spell=5487
Level 10
Shapeshift into bear form, increasing melee attack power by 30, armor contribution from items by 180%, and Stamina by 25%. Also allows the use of various bear abilities.

Aquatic Form: www.wowhead.com/?spell=1066
Level 16
Shapeshift into aquatic form, increasing swim speed by 50% and allowing the druid to breathe underwater.

Cat Form: www.wowhead.com/?spell=768
Level 20
Shapeshift into cat form, increasing melee attack power by 40 plus Agility. Also allows the use of various cat abilities.

Travel Form: www.wowhead.com/?spell=783
Level 30
Shapeshift into travel form, increasing movement speed by 40%. Only useable outdoors.

Dire Bear Form: www.wowhead.com/?spell=9634
Level 40
Shapeshift into dire bear form, increasing melee attack power by 120, armor contribution from items by 370%, and Stamina by 25%. Also allows the use of various bear abilities.

Moonkin Form: www.wowhead.com/?spell=24858
Level 40 (Balance Talent, row 7)
Shapeshift into Moonkin Form. While in this form the armor contribution from items is increased by 370% and all party and raid members within 45 yards have their spell critical chance increased by 5%. Single target spell critical strikes in this form have a chance to instantly regenerate 2% of your total mana. The Moonkin can only cast Balance and Remove Curse spells while shapeshifted.

Tree of Life: www.wowhead.com/?spell=33891
Level 50 (Restoration Talent, row 9)
Shapeshift into the Tree of Life. While in this form you increase healing received by 6% for all party and raid members within 45 yards, and you can only cast Restoration, Innervate and Barkskin spells, but the mana cost of your healing over time spells is reduced by 20%.

Flight Form: www.wowhead.com/?spell=33943
Level 68
Shapeshift into flight form, increasing movement speed by 60% and allowing you to fly. Cannot use in combat. Can only use this form in Outland or Northrend.

Swift Flight Form: www.wowhead.com/?spell=40120
Level 71
Shapeshift into swift flight form, increasing movement speed by 280% and allowing you to fly. Cannot use in combat. Can only use this form in Outland or Northrend.

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