Today I saw a bird with a black head, neck and back. The chest is white with the sides of the chest being the color of a robin. I thought it was a red breasted grosbeak at first. The bird was about the size of a red breasted grosbeak. There is no red patch in the neck area. The tail is longish and narrow. I live in Souderton, Penna near woods and a stream. Can anyone tell me what this bird is? I also thought maybe a Baltimore Oriole but that was way off in color.