69. Forster Tern (Sterna forster’). 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; Dill 
red, blackish at end; crown black; back pearl. Ads., 
winter. _Porehead and underparts white; bill black. 
Yng. Similar to last, but above with brownish; tail 
eer Notes. A vibrant, purring, ¢earrr, 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 paradiscea). 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 qd Alaska; winters 
south to California and Virginia. 
72. Roseate Tern (Sterna dougalli).Ls 15.5; T. 7.5, 
forked, 5.2. Ads., summer. ‘Bill lia ck, 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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