MONSTERS AND MYTHICAL BEASTS
The cockatrice is a monstrous creature from 12th century European folklore. Described as an abominable creature hatched from an egg that was laid by a cockerel and incubated by either a toad or a serpent (depending on accounts), the monster has the body of a serpent, the head of a rooster, and only 2 legs. Similar to the basilisk, the cockatrice was reported to have a deathly gaze, and skin that burned all that it touched, ravaging livestock and crops alike.
That said, the cockatrice is still technically half snake, half chicken, making it a fairly stupid beast, easily killed by being shown its own reflection- assuming you can get near enough without meeting its eyes…
Domestic chicken farms
Many sizes have been described in literature and art over the ages, though this specimen was 14” tall, and 36” long.