As I was taking pictures of this Cedar Waxwing (Bldg. 11B), a White-breasted Nuthatch crashed into the window right in front of me.  It sat there stunned for several minutes, then flew into a nearby tree.  I didn't get a good picture of it because I didn't want to scare it back into the window.  I'll never know if he survived or later died from the head trauma.