n large animal 

Perception +8; low-light vision, scent (imprecise) 30 feet

Skills Athletics +10, Stealth +8, Survival +6

Str +4 Dex +2 Con +3 Int -4 Wis +2 Cha +0

AC  17; Fort +11, Ref +8, Will +5

HP 35; Resistances poison 3

Feign Death [R] Trigger The opossum is reduced below 15 HP; Effect The opossum collapses. It is flat-footed and can use actions that require only its mind, but any other action ends the ruse. A successful DC 18 Perception check to Seek or Medicine check to Recall Knowledge is required to determine that the animal is not, in fact, dead.

Revived Retaliation [R] Trigger The opossum is attacked or disturbed by a creature within reach while Feigning Death; Effect The opossum Strikes the triggering creature.

Speed 30 feet, climb 20 feet

Melee [>] jaws +10 (deadly d10), Damage 1d10+4 piercing

Melee [>] claw +10 (agile), Damage 1d6+4 slashing

Melee [>] tail +10 (reach 15 feet), Damage 1d4+4 bludgeoning plus Grab

Grasping Tail A giant opossum can drag a Small or Tiny creature it has grabbed with its tail along with it when it Strides.

Bestiary 3, page 192.