Terns. 



69. Forster Tern {Sterna for stert). L. 15; T. 7, 

 forked. 4. Ads., summer. Inner web of outer tail 

 feather dusky; below pure white; bill orange, blackish 

 at end; crown black; back pearl. Ads., winter. 

 Crown white or grayish; a large black spot about eyes', 

 bill black. Yng. Similar to winter ad. but 

 above with brownish. Notes. A long drawn, deep, 

 reedy cack and tweet-tweet-tweet-tweet . 



Range. — North America; breeds locally north to California, and 

 from Texas along coast to Virginia and in interior to Manitoba; wan- 

 ders to Massachusetts; winters from southern California and Texas 

 south to Brazil. 



70. Common Tern {Sterna hirundo). L. 15; T. 5.5, 



forked, 3.2 Ads., summer. Outer web of outer tail 

 feather dusky; below white, washed with dusky; bill 

 red, blackish at end; crown black; back pearl. Ads., 

 winter. Forehead and underparts white; bill black. 

 Yng. Similar to last, but above with brownish; tail 

 shorter. Notes. A vibrant, purring, tearrr, and other 

 calls. 



Range. — Northern hemisphere; in America, chiefly east of Plains; 

 breeds locally on coast and in interior from Gulf States to Barren 

 Grounds and Greenland; winters south of United States to Brazil. 



71. Arctic Tern {Sterna par -adisaed). L. 15.5; T. 

 7.2 forked 4.5. Similar to No. 70, but summer ad. 

 with bill wholly bright red; tail longer; tarsus shorter, 

 .6 instead of .7. Notes. Like tearr of No. 70, but 

 shriller, ending in rising inflection, like squeal of a 

 pig. (Brewster.) 



Range. — Northern hemisphere; breeds from Massachusetts north 

 to Greenland and northwest to Aleutian Islands % i Alaska; winters 

 south to California and Virginia. 



72. Roseate Tern (Sterna dougatti] . U 15.5; T. 7.5, 

 forked, 5.2. Ads., summer. 'Bill Uick, reddish only at 

 the base; below white tinged with shell pink; tail 

 wholly white; crown black; back pearl. Ads. , winter. 

 Forehead with white; no pink below. Notes. A reedy 

 cack. 



Range. — Temperate and tropical regions; breeds in North America 

 on east coast only, from Florida north to Nova Scotia; rare north of 

 Virginia; winters south of United States to Venezuela. 



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