We have a Carolina wren that has built a nest in a potted plant on our back deck. We can see her in there sitting on the eggs, but sometimes she leaves for periods of time. I just looked at it (we can see in the nest without getting too close), and she is not in there. I also noticed that there are only two eggs now, when there were three yesterday. What could have gotten the egg? Do you think she may have abandoned the nest now? I saw three eggs just last night, and this morning she was in the nest.