You can use your tail to defend against trip attacks and to hang from nearby protrusions.

Prerequisites: Acrobatics Score 8, Vanara

Benefit: If your square has a branch or other sturdy large object that you could hang from, as a swift action you may make a DC 15 Acrobatics check to jump upward and use your tail to hang from that object. While hanging, you can't be tripped and you ignore floor effects such as the effects of difficult terrain, and you gain a +4 bonus bonus to saving throws against repositioning attacks. If you leave that square (including if you are moved against your will), you lose your grip on the object and are no longer hanging. While hanging, you cannot use your tail for anything else.