AQ CIRCULAR 363, U. S. DEPARTMENT OF AGRICULTURE 
night, the golden plover in this remarkable journey flies both day and 
night. As it swims lightly and easily it may make a few short stops 
along the way, and it has been actually seen resting on the ocean. 
Other shore birds have been observed busily feeding in that great area 
B4767M 
FIGURE 21.—Migration routes of North American birds. Though this map was prepared chiefly to show 
the flyways used by waterfowl, most of these routes also are utilized by innumerable land birds. For 
example, the important Mackenzie Valley-Great Lakes—Mississippi Valley route is shown (with its 
tributaries) from the Arctic coast to the delta of the Mississippi River. 
of ocean known as the Sargasso Sea, where thousands of square miles 
of floating seaweed teem with marine life. 
The annual flight of the adult golden plover is so wonderful that 
it may be given in some detail, particularly since it is one of the 
