Owlbear (CR 4)

Large Magical Beast
Alignment: Usually chaotic evil
Initiative: +1 (Dex); Senses: scent, Listen +8, and Spot +8


AC: 15 (-1 size, +1 Dex, +5 natural), touch 10, flat-footed 14
Hit Dice: 5d10+25 (52 hp)
Fort +9, Ref +5, Will +2
Speed: 30 ft.
Space: 10 ft./5 ft.
Base Attack +5; Grapple +14
Attack: Claw +9 melee
Full Attack: 2 claws +9 melee and bite +4 melee
Damage: Claw 1d6+5, bite 1d8+2
Special Attacks/Actions: Improved grab
Abilities: Str 21, Dex 12, Con 21, Int 2, Wis 12, Cha 10
Special Qualities:
Feats: Alertness; Track
Skills: Listen +8 and Spot +8
Advancement: 6-8 HD (Large); 9-15 HD (Huge)
Climate/Terrain: Temperate forest
Organization: Solitary, pair, or pack (5-8)
Treasure: None

Source: Monster Manual

Combat

Owlbears attack prey - any creature bigger than a mouse - on sight, always fighting to the death. They slash with claws and beak, trying to grab their prey and rend it apart.

Improved Grab (Ex): To use this ability, the owlbear must hit with a claw attack.