I visited the Cathedral of Saint John the Divine on the Upper West Side of Manhattan this week. They started building this in the 1800s. It's not finished yet. Stone masons tap away there at a medieval pace.
I subsequently found that peafowl have lived on the grounds at Saint John the Divine for decades. They were gifts. They have a heated shelter where they are regularly fed. Although I did not see them, two others of the more common blue and green kind live there too.
They stay near the church, though the gates are open and nothing visible keeps them from strolling down Amsterdam Avenue. They seem to know that they are church peacocks.
The peacock is an old Christian symbol of resurrection, possibly because it annually molts and re-grows its showy feathers. Peacock feathers are added to church decorations at Easter season, and a few peacocks show up in Christmas nativity scenes.
Take it from me. When you encounter an unexpected white peacock anywhere in Manhattan, it seems like a miracle.