By CIRCULAR 363, U.S. DEPARTMENT OF AGRICULTURE 
in Alaska, probably migrate chiefly down the western coast, as the 
species is ‘not infrequently reported on the coast of California and 
also on the western coast of South America. 
Oe ean ee 
Gees 
eae TT 
CEE baiuunaa Cee? 
i SAK 
Ace 
@ Breeding 
& Winfer 
(e) Migration 
+ Banding Station 
X Recovery Point 
B4750M 
FIGURE 15.—Distribution and the migration of the arctic terns of eastern North America. The route 
indicated for this bird is unique, as no other species is known to breed abundantly in North America and 
to cross the Atlantic Ocean to and from the Old World. The extreme summer and winter homes are 
11,000 miles apart, and as the route taken is circuitous, these terns probably fly at least 25,000 miles each 
year. 
The evidence yielded by banding consists of only three definite 
cases, but their interpretation seems to permit but one conclusion: 
All three birds were banded as downy chicks, one on July 3, 1913, at 
