I found out who put the spanish moss and new sticks on the nest, an osprey. I have yet to check out it's markings to verify if it has been on the nest in the past. It could just be passing through for it's southward travels.About two weeks ago we had six osprey circling above our office, where the nest is located on Mathews Drive, using the warm air currents to keep them aloft. I had never seen that before with osprey...flying in a group that is. Maybe some of our osprey viewers may have knowledge of osprey flying together.
Not sure why this osprey is bringing in spanish moss and sticks, though I'm sure next seasons osprey will appreciate it!