One legged Bullfinch.
Which isn't one-legged.
Must have been hiding it yesterday. It is hobbling quite badly, and its foot is bent underneath, but she's still tweeting loudly and feeding.
Edited: it's a he. And he's a chaffinch. Still has a bad leg though. (thanks jenceng)
We've received some very sad news today, so comments are off. Catch up soon.