Cover Characteristics: Book Covers featuring Feathers

Feathers are interesting little things, aren't they? And pretty. But did you know peacock feathers are considered to be bad luck, especially for performers? I learned that in a book (Girl on a Wire, to be precise), which seems very fitting considering this is a book blog. There's also a belief that "feathers appear when angels are near" and that feathers are a message from loved ones who have...