So sorry, but now they can tell others for next year and you could have another rental then.
How wonderful for you. I have been watching the hawks at Cornell University, who also have the best site about birds. Here is the link. https://www.allaboutbirds.org/
A neighbor just dropped by, we both watch this little fellow take his solo flight. I took the basket down, and the robin had 5 little ones, unfortunately one was dead in the nest. Due robin use the same nest 2x? I would love to have another set of "door bells"
Not sure where you live...but here in New England I've seen our robins have several clutches in the same nest over the spring and early summer. Once the young fly out....the parents start all over again.
I suppose he will soon follow the rest of the family...