I am pretty sure that if our species had to hatch out of eggs we would all just give up and die in the shell. It is absolutely amazing what a little chick goes through to hatch. This little quail chick pipped yesterday which means it broke a tiny dent in the shell. That's it. It sat there all day and all night and almost all day today and only broke the shell a tiny bit more. Then this evening it finally started to zip which means it started breaking all the way around the shell. If you sit there and watch them do this you will be so tempted to reach in and help them out. They take so long and sometimes they seem to stall and don't get anywhere for several tries. But the chick is so much better off if you don't help unless you absolutely need to. So my little chick zipped almost all around the egg, then it struggled and struggled and finally managed to push its head out.
All seemed well now except that it was stuck because it hadn't quite zipped all the way around. It struggled and pushed over and over again. It broke off some of the shell with its feet. I really, really wanted to help but I waited.
It pushed and pushed some more. I bet it took another 10 minutes before it finally started to lift its back end out of the shell.