I checked on the nest today and there were two eggs, not just one!!! Some quick googling on robin eggs leads to some interesting facts. Robins typically lay four eggs. The momma bird lays one egg per day and then incubation begins after the last egg is laid. The incubation period is 12-14 days. Assuming these are fertilized eggs, we should have little birdies in a few weeks. I wonder if there will be three eggs tomorrow?!?!