After strolling for a while I knew it was time to get back to work. All was quiet by the southern tip of the lake. Usually there's lots of sparrow chatter. Silence means only one thing. Hawk. Sure enough, there on the branch sat hawk on-the-hunt. I watched and followed for a bit before hawk swooped off towards Bethesda Fountain. I didn't have time to run after hawk....... maybe another day.