426 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



Black-bellied Plover (summer plumage). 



plumage, but usually showing traces of whitish on the feathers; 

 abdomen and under tail coverts, white; forehead, white; axillars, 

 smoky black. 



Adult in winter: Throat and breast, not 

 black; upper plumage, brownish, mottled with 

 gray; under parts, white; breast and sides, 

 streaked with ashy brown; bill, black; under 

 parts sometimes showing traces of blackish, 

 but not black; as in the breeding plumage. 

 Unlike our other Plover this species has a 

 rudimentary hind toe. Black-bellied Plover. 



Length, 11.25; wm g> 7-45! tarsus, 1.85; bill, i.io. 



The Black-bellied Plover is more or less common in Illinois and 

 Wisconsin during the migrations. As is the case with a number of 

 species, a few non-breeding birds remain throughout the summer. 

 The black axillary plumes and rudimentary hind toe are good 

 distinguishing characters in any plumage. 



Genus CHARADRIUS Linn. 



135. Charadrius dominicus MULL. 



AMERICAN GOLDEN PLOVER. 



Local names: Green Plover. Prairie Pigeon. 



Distr.: Arctic America (except the shores of Bering Sea), mi- 

 grating through North America to southern South America, in winter; 

 breeds in the far north. 



