In the early evening, Pale Male was in a tree in the Great Lawn.  He flew off after something, and both birds touched in flight.  I couldn’t identify the species of bird Pale Male got into a tussle with, but if I had to make an educated guess, based on its square striped tail and size relative to Pale Male, I would choose Sharp-shinned Hawk.  Afterward, Pale Male was found in one of his favorite roost trees.  I didn’t have a chance to see if he stayed in the tree for the evening.