The newest addition to the pigeon family/ pigeon rescue 2

I picked this one up from next door's doorstep, around the corner on Market Passage, thinking it was one of mine. But on closer inspection- it has too many yellow feathers at the back of it's head, and a white tip to it's beak. I think it comes from the nest in between my house & next door. I suspected there must be a nest there, as I've heard chirping when doing the washing up. Anyway, I think it's safer on my balcony than on the street downstairs, and I've left it food. And one of my squabs has returned, and is snuggled up, keeping it company. I think the father is even feeding it.