Sad update from this morning.
We had a line of strong storms move through the area this morning. Looking out our window at 9:20am I heard a loud CRACK!! and our osprey tree (pictured above), toppled over into the lagoon. I did not see an adult escape.
Upon close inspection, the nest had separated from the tree floating in the lagoon. There is an intact egg still on the nest. Under the tree's former location was the partially destroyed remains of a 12" bass. The tree (which had its top ripped out by Hurricane Matthew in Oct., 2016) had termite damage close to the ground which finally caused the failure.
A short while later, the male osprey began circling the are where the next should be and calling out.
I checked the recording on a security camera which covers that area and found the sequence leading up to the tree going down. Less than a second before it hit the ground, the female took to the air. She did not return for a couple of hours, but now both parents are circling their habitat.
Osprey mate for life and usually return to the same nest each year. This was their third year nesting in that tree and our first hope for nestlings since the past two years proved fruitless. They usually choose dead trees, lighting or power towers, or high-off-the-ground man-made nesting boxes. There are no other dead trees nearby, so we will not likely see them nest in this area again.
The male came back and retrieved his breakfast bass a little while ago.

Osprey tree/nest down

Breakfast bass

Osprey egg on the remains of the floating nest.