Chlidonias niger
            
               (L 9.75" WS 24" Wt 2.2 oz)
          
         
            
               Summers in north U.S. and
               Canada...winters along shores
               of northern South America.
          
         
            
               Boca Chica Beach
            
               12Apr2014
          
         
         
            
               One good tern deserves another.
            
                   (Anonymous)
          
         
            
               © BirdNote,
            
               Bob Sundstrom
          
         
            
               Chlidonias in Greek
refers to a
               swallow; niger is Latin for
               black.