n small beast 

Perception +8; darkvision

Skills Acrobatics +11

Str -2 Dex +4 Con +1 Int -3 Wis +1 Cha -1

AC  19; Fort +8, Ref +11, Will +6

HP 45

Speed 20 feet, fly 40 feet

Melee [>] beak +13 (finesse, magical), Damage 1d8 –2 piercing plus calcification

Calcification (incapacitation, primal, transmutation) A peck from a cockatrice hardens the flesh of the creature struck. The target must succeed at a DC 20 Fortitude save or become slowed 1 (or slowed 2 on a critical failure). Further failed saves against calcification increase the slowed condition. Once a creature's actions are reduced to 0 by calcification, that creature becomes petrified. Every 24 hours after it was petrified, the victim can attempt a DC 20 Fortitude save to recover. On a success, it becomes flesh again, but is slowed 1 for the next 24 hours. On a critical success, the creature recovers and isn't slowed. On a failure, the creature remains petrified, but can try again in 24 hours. On a critical failure, the petrification is permanent, and the creature can't attempt any more saves.

Bestiary, page 66.