This is the story I am looking for. I was in elementary school when my father read it to me. I’m afraid that it might have morphed some in my memory. It has stuck with me a long time. I’m 65. So he would’ve read it to me in the mid 60’s. This story sounds vaguely similar to the Nightingale but I do not remember a mechanical bird in my story. It is tragic like the Brothers Grimm or Hans Christian Andersen stories. I do not have a title or an author.
This story involves a bird that a man, maybe a king, is enamored of, either because of its beauty or its song. I don’t remember which. The bird pleases the king so much that the king decorates it with jewels. It seemed like he thought he was was rewarding the bird. Giving it value. The bird can’t fly, can’t do bird things, is ostracized by its friends, becomes tragically lonely and dies of a broken heart. That’s what I remember.