COMMON TERN 



70. Sterna hirundo. 15 in. 



Mantle darker than that of any of the similar terns; 

 washed with grayish below; bill and feet bright red, 

 the former shading to black on the tip; tail less deeply 

 forked (3.1 in.) ; edge of outer primaries and outer 

 tail feathers, blackish. Changes in winter correspond 

 to those of the last. Young birds have the feathers on 

 the back margined with brownish. 



Note. An energetic " tee-arr, tee-arr." 



Nest. The three eggs are laid in a slight hollow on 

 the sandy beach. 



Range. Breeds locally from the Gulf States to Green- 

 land and Hudson Bay; winters south of the U. S. 



ARCTIC TERN 



71. Sterna paradiscea. 15.5 in. 



Similar to the Common Tern, but tail longer (forked 

 4.5 in.) and bill wholly red. In winter, bill and feet 

 dark, as are those of the others. 



Range. Breeds from Mass, northwards; winters in 

 the south. 



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