Flying Serpent, The (1946)

A demented archaeologist, Dr. Andrew Forbes (George Zucco), discovers a serpent known to the Aztecs as Quetzalcoatl (the Killer Bird God) and accidentally kills his wife (Hope Kramer) by giving her one of the beast’s feathers, causing the creature to track her down and slaughter her. Now Dr. Forbes uses this knowledge to get revenge upon his enemies by placing one of the serpent’s feathers on an intended victim and letting the beast loose. Also stars Ralph Lewis.