They're having babies, right there at my door. Not a very private place but there you have it. I thought they had gotten used to me when they stopped flying up when I came in or left, but I realized they're incubating eggs. I'm a little excited but nervous that the super will disperse them. But he hasn't yet, & they've been there a week. Pigeon eggs take 18 to 19 days to hatch with both parents incubating the eggs, then feeding the squabs with regurgitated "pigeon milk."