Where are all the pigeon babies?

During a conversation with a mate this topic came up, neither of us, during our 20 years alive, have seen a baby/young pigeon! All the pigeons you see are full-sized..

Where the hell are the baby-pigeons? I mean, maybe they're in nests, but to never have seen one is somewhat strange..

I used to have a pigeon family on my balcony. They laid an egg and we watched it hatch and grow up... and then cry all the fucking time and shit everywhere. So when it (finally) was able to fly, I boarded up the gaps to keep the pigeons off the porch. I also had to throw a couple of new eggs off the edge, because I wasn't going to deal with all that again.