Well, taken from WoW Wiki:
Quote:
In Moonkin and Tree of Life form the following are true:
-Like the others, Moonkin and Tree of Life forms make the druid immune to Polymorph, and shifting in and out of them will remove moving de-buffs.
-Moonkin Unlike the others, is not considered a beast, therefore, it is immune to any beast crowd control, such as Hibernate. it is , however, Humanoid.
-Tree of Life is considered as Elemental, and can be banished by a Warlock.
-Moonkin can be affected by any ability or spell that can affect Humanoids, except Polymorph (Sap and others will work). Same case with Tree of Life, except it will be vulnerable to Elemental dependent abilities (such as Banish).
-Weapon procs and enchants will proc under any of these two forms.
Regarding that last line, if weapon procs and enchants work for both Moonkin and ToL, it's safe to say that both of these forms use the real weapon skill rather than the hidden Feral combat skill.