I have noticed a Sharp-shinned Hawk in the neighborhood for the past 10 days 
or so.  This morning I had the pleasure of watching it being mobbed in the 
air by at least 20 Barn and Tree Swallows.  They swarmed around it ... 
above, below, behind and in front of ... and every now and then one would 
dive bomb directly at it.  Fun to watch.

Jim Wilson
Queenstown