Shapeshifting is an ability that is distinct to the Druid class. They are able to transform into Bear Form, Aquatic Form, Cat Form, Travel Form, Dire Bear Form, Flight Form, and Swift Flight Form. Their are also two other forms available through talnets. Moonkin Form, with 31 points in the Balance tree and Tree of Life Form, with 41 points in the Restoration tree.
All forms; with the exception of Moonkin (Humanoid) and Tree of Life (Elemental), are considered Beasts. As such they can be the target of spells like Hibernate or Scare Beast. It is also important to note that the act of shapeshifting frees the caster of Polymorph and Movement Impairing effects.