I noticed this the other day. I don't think they had this last year or I would have seen it. Once the leaves dropped from the trees I saw it. I sure hope it brings a pair back to nest.
We had owls visiting our trees a few years ago. Here is a link to the time they visited our pine tree.
Owls in Our Trees.
They didn't nest in our trees but brought the young owlets one night and they spent most of the summer in that pine tree, the ground was littered with bones from their parents hunting and feeding them. I felt sad for the bunnies they brought them, nature seems cruel at times.