I added an appropriate seasonal visitor to my library today. He's only cardboard and plastic -- no actual ravens were harmed.
My eight-year-old daughter asked, "why would you put a raven in a library?"
"Do you know about Edgar Allen Poe?"
"Oh yes! He wrote 'The Bells' and 'Annabel Lee.'"
When I was growing up, my family had a plastic raven on a perch sitting in the living room all year. When you pushed a button, he’d caw and flap his wings and screech “Beware! Beware! The end is near!” Twenty years later, he doesn’t flap his wings anymore, but he’s still predicting that doom is just around the corner.