Thank you everyone for your replies. I think it was not on the balcony this morning, but I only could see (a) the part that is visible through the door and (b) the part that is visible when I stick my head out the window next to the balcony. So there's a slim chance it was behind something but I think not.

One thing I don't know is if either of the new neighbors -- upstairs and downstairs -- is keeping trash on their patio/balconies. I hope not.

I have to go out on the balcony soon to get rid of some of the stuff in the patio storage containers so I can use the space for temporary storage when I have my new floors installed. I was thinking I might go out there tomorrow. I will make lots of noise before I do, bang on pots and pans or something.

I have known for years that we have raccoons as well as foxes in our 'hood, I was just very surprised to see one on the second floor and worried that it had jumped down from a nearby tree and was unable to leave. I'm glad this was not the case!