Troll, Tree (CR 2)

Small Monstrous Humanoid
Alignment: Usually chaotic neutral
Initiative: +3 (Dex); Senses: scent, Listen +4, and Spot +4

AC: 19 (+1 size, +3 Dex, +5 natural), touch 14, flat-footed 16
Hit Dice: 2d5+8 (17 hp)
Fort +4, Ref +6, Will +4
Speed: 20 ft., climb 30 ft.
Space: 5 ft./5 ft.
Base Attack +2; Grapple -7
Attack: 2 claws +4 melee, bite -l melee
Full Attack: 2 claws +4 melee, bite -l melee
Damage: Claw 1d3+1, bite 1d3
Special Attacks/Actions: Improved grab
Abilities: Str 13, Dex 16, Con 19, Int 9, Wis 12, Cha 12
Special Qualities: Uncanny dodge, regeneration 3
Feats: Alertness
Skills: Balance +11, Climb +14, Hide +10, Jump +6, Listen +4, Spot +4, and Tumble +8
Advancement: By character class
Climate/Terrain: Temperate forest
Organization: Solitary, gang (2-4), or band (6-11)
Treasure/Possessions: Standard

Source: Dragon #299

Improved Grab (Ex): If a tree troll hits an opponent with a claw attack, it deals normal damage and attempts to start a grapple as a free action without provoking an attack of opportunity (grapple bonus +4). If it gets a hold, it deals automatic bite damage. In subsequent rounds, each successful grapple check it makes during successive rounds automatically deals claw damage.

Uncanny Dodge (Ex): Tree trolls have the ability to react to danger before their senses would normally allow them to do so. Tree trolls retain their Dexterity bonus to AC (if any) regardless of being caught flat-footed or struck by an invisible attacker.

Regeneration (Ex): Fire and acid deal normal damage to a tree troll. If a tree troll loses a limb or body part, the lost portion regrows in 3d6 minutes. The creature can reattach the severed member instantly by holding it to the stump.

Skills: Tree trolls have a +8 racial bonus to Balance checks in forested areas, and a +8 racial bonus to Hide checks.

Tree trolls prefer to use their stealth tumbling abilities to get close to opponents and then latch on, gnawing away at their foes. Tree trolls have no fear except for fire, which eats away at their treetop homes and flesh. Tree trolls have simple tactics of attacking one foe after another. Gangs of tree trolls often swarm out of trees to fall upon one victim. Even large numbers don't dissuade them as they relentlessly swarm over one foe after another.