As I wrote earlier, a pair of mourning doves decided to nest on my front terrace, and the babies hatched yesterday! Sure enough, wikipedia was right, they took about 15 days to hatch.
If you look carefully, you can see some of the action in these videos, shot Friday and this morning. In this first one, after the first shift change of the day, one of the birds seems very agitated and is likely calling for the other (mouth open):
And sometime overnight, they managed to throw the egg shells out of the nest. This video's from this morning. If you pause the video around 13 seconds you can see the babies there during the shift change: