The Cockatrice or Basilisk was a popular form of church ornament in church furniture. It has the head and wings of a cock and the tail of a serpent. In mythology it was hatched by a toad from the egg of a seven year old cock. It was believed the best way to meet such a beast was using a mirror so that the beast died upon seeing its' reflection. Examples can be seen at Tostock, Ixworth Thorpe, Wimbotsham and Stowlangtoft. See Arthur Gardner, Minor English Wood Sculpture, 1400-1550 1958.