How interesting! First time I've seen that!
Well, because it is still really early in breeding season, because it is at a birdfeeder and a flat surfaced one, I looked up Mourning Dove. Doves are prolific breeders, starting early and finishing late every season. They lay a white egg which is just over 1" long.
Now why it got laid here is unknown! Kind of like having a baby on the way to the hospital? Or did a nest-robbing predator bird deposit/drop it here?
A very interesting observation, June!
I went to show my husband the egg and it had been moved to the corner and surrounded by seeds and a morning dove had just been on the feeder.
Any chance you've seen their nest nearby? Try to watch where they fly or listen for a "coo" call. If it's low enough, you could try placing it in the nest.
The next day....
June, any luck or news to report today?
After my last text to you, the dove was back and when I looked again, the egg was gone. Could it have taken it? It wasn't on the ground because it would have hit our blacktop driveway 2 stories below if it was pushed off the feeder?
Most likely some bird removed it. I wouldn't venture a guess who.
The egg initially could've been laid by an inexperienced bird. Hopefully she'll choose a better spot next time!
Thanks to June S. for sharing her observation and pictures. It was a very interesting observation!