The peacock is a symbol of immortality because the ancients believed that the peacock had flesh that did not decay after death. As such, early Christian paintings and mosaics use peacock imagery, and peacock feathers can be used during the Easter season as church decorations. This symbol of immortality is also directly linked to Christ.
The peacock naturally replaces his feathers annually; as such, the peacock is also a symbol of renewal.
Early belief held that the Gates of Paradise are guarded by a pair of peacocks.
The peacock has the ability to eat poisonous snakes without harm.
Both Origen and Augustine refer to peacocks as a symbol of the resurrection.
Pythagoras wrote that the soul of Homer moved into a peacock—a hyperbole to establish the respect and longevity of the Greek poet’s words.
The Greeks dedicated the peacock to Juno, the goddess of sky and stars, in recognition of the golden circles and blue background of the peacock’s tail.
Other images and beliefs:
“By the Peacock” was a sacred oath, because the peacock was thought to have the power of resurrection, like the Phoenix.
A necklace of Amethyst, peacock feathers, and swallow feathers were a talisman to protect its wearer from witches and sorcerers.
Christians thought, in early times, that the peacock's blood could dispel evil spirits.
The peacock often appears among the animals in the stable in Christ's nativity.
Two peacocks drinking from a chalice symbolizes rebirth and angels are often depicted with four wings of peacock feathers.
In Egyptian, Greek, and Roman mythology, the peacock feathers were considered much like the evil eye. They were all seeing.
In the western world, the peacock was referred to as a slayer of serpents. The shimmering colors of his tail feathers were explained by his supposed ability to transform snake venom into solar iridescence.
Alchemist thought the fan of the peacock (cauda pavonis) is associated with certain texts and images that are useful in turning base metals into gold.