Jack was the only one to see the 2 red tails on the nest today. Today they started to bring in new material to the nest. Bark and other soft material. At break I went outside to watch and the red tail was actually stripping bark off the tree. Was able to watch her and then get one close up shot of her.
Talked to a red tail watcher about the stripping of the bark and here is the explanation: bark stripping is used like an insecticide. some bark does repel insect - this is a natural form of insecticide.