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Hi. My dad chased a pigeon from our balcony and the mother came back after it rained, but then she left and never came back for the night.
I waited an hour and then took the egg back in. (It wasn't that cold outside.) I put the egg in warm water at about 38 degrees very carefully until a box could be made ready with a warm light and a towel. Then I put the egg inside the box and put it on top of the towel. I read online that you need to keep it relatively humid in the box and let enough air in for the egg to breath. I didn't know if the egg was fertilized but I warmed it for 5 days anyway next to a thermometer that showed the temp. The next morning the pigeon came back and my dad tried to put the egg back while it was here but the pigeon flew away again. One is male and the other female although I don't know which is which. One pigeon seemed to like the round flower pot with soil in it compared to the large rubbermaid box with soil. Maybe because the pot is round like a bird's nest? These pigeons didn't bring any branches or sticks to make a nest either. Could they be psychologically confused? Anyway on the 5th day I took a flashlight and looked into the egg they had abandoned in the washroom with the lights turned off and saw that a dark spot had appeared on one side of the wide part of the egg. I thought that somehow I had put the lamp too close to the egg and had accidentally cooked it on one side. I had never let the temp go over 40 celcius. I always tried to keep it at 37 degrees. I felt really bad, but decided to keep for a bit longer. I kept warming it until today which is the 10th day and I see (in the dark with a flashlight) that blood capillaries have formed where that dark spot was and in the centre of the capillaries is a small embryonic shape. It was pretty exciting for me, except I keep doubting myself and think that somehow it did develop to a point but died. I am not sure if it is still developing but I know that it is the first time I have ever found an abandoned pigeon egg and no matter what happens, I am trying my best. The pigeons sometimes come back, but they always fly away and most nights don't stay here. I have read several internet sites which described that the egg needs air (for oxygen exchange across the shell membrane), humidity (85%) and proper temperature (37 celcius). I am planning on what to do if it ever hatches. They suggest I feed it with an eye dropper and mashed (until pasty) bird seeds like the regurgitated milk their parents give them. Today I changed the towel it was sitting on since I think it's doing a good job of developing and deserves a clean fresh towel. I am glad I gave it time to develop and didn't give up yet. I am still wondering if it will hatch and if it will be healthy when does hatch.