A bird of some sort is squatting in my spare letterbox, wih 10 eggs, just
now hatching. I can't tell two birds apart except this isn't a pigeon so
it's not for the chop. It is small, black and grey with a yellow splash on
its chest.

I was wondering if the best thing to do is leave it alone to get on with it
or to show a spot of hospitality by posting a worm or two through the
letterbox. Anyone have any ideas what it might be / to feed or not?

cheers