He's a starling from a place called "Africa" or something. He's little and stays in his cage. Yuu isn't really a bird you can pick up and handle... but his chirps are pretty.

[Obito gave him a not very nice name, considering how nice the bird is, but Obito wasn't a very happy person when he got around to naming it. Learning that your cousin may have killed your entire family off kind of dampens the spirits a bit.]