Snake, Constrictor (CR 2)

Medium Animal
Alignment: Always neutral
Initiative: +3 (Dex); Senses: scent, Listen +7, and Spot +7


AC: 15 (+3 Dex, +2 natural), touch 13, flat-footed 12
Hit Dice: 3d8+3 (16 hp)
Fort +4, Ref +6, Will +2
Speed: 20 ft., climb 20 ft., swim 20 ft.
Space: 5 ft./5 ft.
Base Attack +2; Grapple +5
Attack: Bite +5 melee
Full Attack: Bite +5 melee
Damage: Bite 1d3+4
Special Attacks/Actions: Improved grab, constrict 1d3+4
Abilities: Str 17, Dex 17, Con 13, Int 1, Wis 12, Cha 2
Special Qualities:
Feats: Alertness; Improved Initiative; Toughness
Skills: Balance +11, Climb +14, Hide +10, Listen +7, and Spot +7
Advancement: 4-5 HD (Medium-size); 6-10 HD (Large)
Climate/Terrain: Warm forest
Organization: Solitary
Treasure: none

Source: Monster Manual

Combat

Improved Grab (Ex): To use this ability, the constrictor snake must hit with its bite attack. If it gets a hold, it can constrict.

Constrict (Ex): A constrictor snake deals 1d3+4 points of damage with a successful grapple check against Medium-size or smaller creatures.

Improved Initiative: +4 on Initiative checks