Thanks for the interesting observations-- both the visit by the immature and the photo of the female on the nest. It is not uncommon for the female to spend some time on the nest for several days before laying the first egg, but once that egg is laid she usually will not budge from the nest until the male relieves her of incubation duties. She may get up and rearrange the nest/eggs and sometimes take a very brief absence, but in our experience so far the best indication that an egg has been deposited is her continuous deep position in the nest-- often only the top of her head is barely visible or the nest may appear to be empty unless watched for 20-30 minutes at a time.
Please, everyone, keep a close eye on the nest as this is one of the precarious times in their breeding cycle, when they are more sensitive to disturbance just before and around when the eggs are laid. Looking forward to returning to Florida and joining the nest watchers soon. We depend upon you to help pin down the date the first egg is laid, as we seem to have been quite accurate in past years.