[Bristol-Birds] Gulls or terns? at Austin Springs (Wash Co, TN)

I arrived at Austin Springs last PM (10/24/07) with just enough light to make 
out the Am. avocets from the bridge.  Near them, about as far away from the 
bridge as you can get and still be in sight, were 10+ gulls or terns.  I could 
not make an ID in the poor light and rain but think they had some black in the 
head.  I was wondering if anyone else got a look at them?  I went around to the 
bridge by Winged Deer to get a better look.  I could see the avocets from 
there, but the gulls/terns hed flown out of sight.  
   
  Also, this AM before work: 
   
  Meadowview near Credit Union (Sullivan Co) 10/25/07
  Virginia rail
  Wood duck

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