Harrier Too Close for the Viewfinder

This was one of two female Harrier Hawks in Valley Forge this morning.  One was flying around a lot looking for breakfast and this one was sitting in the field calling to the other one.   I got closer and closer to this one until she swooped up and came directly over my head and fluttered above me.  A little intimidating looking through that 600mm lens with a 1.4 extension.  Anyway, lots of fun today.