Waxwings are stunning birds...my first one was in a Morrisons car park! Needless to say, the shopping was delayed that day...I'd far rather watch any bird than do the shopping.
Re the starlings mimicry. I know they mimic sounds as they once had my friend and I fooled, whilst birdwatching at Spurn. We could hear a curlew calling and spent a good ten minutes searching the field for it, practically going bog eyed in the process. Giving my eyes a rest, I glanced up, and there on a telegraph wire was a starling singing it's head off....in Curlew!!

Well, at least we hadn't dipped out on the curlew.....
I've also heard them do a respectable female mallard's cackle...that was at Spurn too.
Cheers.