Ring Ouzel??

I have just been watching a couple of birds in my garden which I've never, ever seen before!! I did try and take a photograph but they really were too far away to pick out clearly. They were pretty much like Blackbirds but they had a white crescent shape on their upper chest. One was slightly more pale than the other...........I have looked in my bird book and I'm almost positive that they were Ring Ouzels, but there wasn't much written about them........can anyone tell me any more about them?? 

'My favourite weather is bird chirping weather'.........Terri Guillemets