With apologies to Mr. Hitchcock. Lately I have been noticing a very large flockof black birds doing some strange flocking/roosting behavior every afternoon as I come home from work. These are f4 or so, ISO 400 or 800, ~1/125, VR on, hand held. Today I grabbed my D2X and 70-200 and finally got some shots. I will go back for more in better light and with different lenses. I have noticed a much larger group earlier in the afternoon. Quite amazing to watch them swoop as a flock.