In what level of World of Warcraft does the druid learn all the different shapeshifting forms?

They come at different levels. You have to do a quest to get bear form and aqua form. Bear is at 10, aqua is at 13. Travel form is 17 or 18. Cat form is like 15. Dire bear form (stronger bear form) at 40. Moonkin is on the balance talent tree. Tree of life or whatever is on Restoration talent tree. Flight form at 60. Swift Flight Form at 71 (5000 gold)