While working, my eyes were drawn to the window of my sixth story office yesterday by-- A young medium-sized Cooper's Hawk circling (hunting?) shortly before 8 am....and... A persistent Merlin around 2 pm, hunting Starlings around the Acacia/Air Rights Building. An American Crow chased it around that building; when they both circled back the falcon was above and dove on it. I saw the Merlin almost catch a Starling. (I have been bringing my binoculars to work every day for a month or more). Otherwise it was work. Rob Bethesda, Montgomery County, Md.