Cockatrice (CR 3)

Small Magical Beast
Alignment: Always neutral
Initiative: +3 (Dex); Senses: darkvision 60 ft., low-light vision, Listen +7, and Spot +7

AC: 14 (+1 size, +3 Dex), touch 14, flat-footed 11
Hit Dice: 5d10 (27 hp)
Fort +4, Ref +7, Will +2
Speed: 20 ft., fly 60 ft. (poor)
Space: 5 ft./5 ft.
Base Attack +5; Grapple +1
Attack: Bite +9 melee
Full Attack: Bite +9 melee
Damage: Bite 1d4-2 plus petrification
Special Attacks/Actions: Petrification
Abilities: Str 6, Dex 17, Con 11, Int 2, Wis 13, Cha 9
Special Qualities:
Feats: Alertness; Dodge; Weapon Finesse
Skills: Listen +7 and Spot +7
Advancement: 6-8 HD (Small); 9-15 HD (Medium-size)
Climate/Terrain: Any temperate planes
Organization: Solitary, flight (2-4), or flock (6-13)
Treasure/Possessions: None

Source: Monster Manual

Petrification (Su): A cockatrice can turn beings to stone with a touch. Creatures hit by a cockatrice must succeed at a Fortitude save (DC 15) or instantly turn to stone.

Petrification Immunity (Ex): Cockatrices are immune to the petrifying ability of other cockatrices, but other petrifying attacks affect them normally (a medusa's gaze, gorgon's breath, a flesh to stone spell, etc.).

The cockatrice fiercely attacks anything that it deems a threat to itself or its lair. Flocks of cockatrices do their utmost to overwhelm and confuse their foes, and sometimes fly directly into their opponents' faces.