SEMIPALMATED PLOVER. 89 



Sound (Townsend). It seems to be more common in the middle 

 Yukon Valley (Bishop) than on the coast. 



This plover breeds south to Sable Island (Dodd); southern New 

 Brunswick (Cheney); the Magdalen Islands (Brewster); southern 

 James Bay (Todd) ; York Factory, in southern Keewatin (Preble) ; 

 probably rarely in northern Manitoba (Macoun) ; on the Slave River 

 of southern Mackenzie (Preble); Lake Marsh, southern Yukon 

 (Bishop); and to the mouth of the Yukon, Alaska (Dall and Ban- 

 nister). 



Winter range. — The species winters on both coasts of South 

 America — south to Port Desire, 48° S. (Seebohm), on the east coast, 

 and to central Chile (Schalow) on the west ; thence through northern 

 South America, Central America, and the West Indies to the southern 

 Bahamas (Bonhote), Florida (Worthington), the coast of Georgia 

 (Helme), South Carolina (Kendall), Mississippi (Allison), and Loui- 

 siana (Beyer) ; on the Pacific coast of Mexico, north to southern Lower 

 California (Brewster). In winter it is thus one of the most widely dis- 

 tributed of the shorebirds. 



Migration range. — The species is a common migrant in eastern 

 North America west to the eastern parts of Texas (Beckham), 

 Nebraska (Wolcott), and Saskatchewan (Macoun). Thence over the 

 plains and throughout the whole Rocky Mountain district it is almost 

 unknown, but reappears on the Pacific Coast, and ranges west in 

 migration to the central Aleutian Islands (McGregor), the Pribilof 

 Islands (Prentiss), and even occasionally across Bering Strait to the 

 coast of Siberia (Nelson). 



Spring migration. — At least four-fifths of the dates on the spring 

 migration of this species fall in May. This is true for the entire district 

 between the winter and summer homes, and the dates indicate that 

 the migration in the United States occurs chiefly between May 10 and 

 June 1. An unusually early individual was taken April 7, 1875, at 

 Erie, Pa. (Sennett). Other spring dates are: Magdalena Bay, Lower 

 California, March 12, 1889 (Bryant); Monterey, Calif., April 17, 1903; 

 Vancouver Island, British Columbia, April 28, 1894 (Kermode); 

 Mount McKinley, Alaska, May 17, 1908 (Sheldon); Kowak River, 

 Alaska, May 30, 1899 (Grinnell) ; Pea and Bodie islands, North Caro- 

 lina, April 25, 1905 (Bishop); Lincoln, Nebr., April 27, 1900 (Wol- 

 cott) ; southern Ontario, average of six years May 18, earliest May 8, 



1885 (Gamier); Melville Peninsula, May 31, 1882 (Parry); Wellington 

 Channel, June 6, 1851 (Greely). The species was taken in Cuba as 

 late as May 22, 1900 (Palmer and Riley); southern Florida, May 25, 



1886 (Scott) ; from New Jersey to the Great Lakes it remains regularly 

 to the first week in June — latest Oberlin, Ohio, June 17, 1904 (Jones) ; 

 latest Worth, 111., June 20, 1894 (W oodruff ) ; and along the coast of 

 Maine nonbreeders occur all summer (Knight). 



