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 paradisea. 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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