Armor Class 15
Hit Points 136 (16d10 + 48)
Speed 30 ft., fly 60 ft.
Saving Throws WIS +6
Condition Immunities petrified
Senses Darkvision 120 ft., passive Perception 13
Languages —
Challenge 8
Flyby. The cockatrice doesn't provoke an Opportunity Attack when it flies out of an enemy's reach.
Multiattack. The cockatrice makes one Petrifying Bite attack and two Talons attacks.
Petrifying Bite. m +7, reach 5 ft. Hit: 13 (2d8 + 4) Piercing damage. If the target is a creature, it is subjected to the following effect. con DC 14. 1 The target has the Restrained condition and repeats the save at the end of its next turn if it is still Restrained, ending the effect on itself on a success. 2 The target has the Petrified condition instead of the Restrained condition.
Talons. m +7, reach 5 ft. Hit: 18 (4d6 + 4) Slashing damage.
Magical Backlash. A creature within 120 feet of the cockatrice deals damage to it. ddex DC 14, the triggering creature. 13 (3d6 + 3) Force damage.
Monster Manual (2024), p. 75