10 BULLETIN 185^ U. S. DEPAKTMENT OF AGEICULTUEE, 



BREEDING RANGE 

 WINTER HOME 



Fig. 3. — Distribution of the arctic tern {Sterna paradissea), the champion long-distance 

 migrant of the world. It breeds as far north as it can find land on which to build its 

 nest, and winters as far south as there is open water to furnish it food. The extreme summer 

 and winter homes are 11,000 miles apart, or a yearly round trip of 22,000 miles. (See p. 9.) 



