46 



SHORE BIRDS OF NORTH AMERICA. 



Triii}?!i fusc.icolliH. 



TRINQA FUSCICOLLIS Vieill. 



White-rumped Sandpiper. 



Adult in summer: Top of the head and back, mottled 

 with black, dull white, and buff; throat, white ; breast, 

 finely lined with dark brown; belly, white; an imperfect 

 superciliary line of dull white; rump, dusky gi*iy iind 

 most of upper tail coverts, white. 



Adult in winter : Top of 

 the head and back, gray- 

 ish, some of the feathers 

 marked with dark brown, 

 giving it a slightly mottled 

 appearance on the back and 

 top of the head; upper 

 throat, white ; breast, ashy 

 gray, the shafts of the 

 feathers showing brown ; 



belly, white; forehead, whitish, extending in an imperfect superciliary line. 

 Length, 6.85; wing. 4.95; tarsus, .1)5; bill, .05. 



This species may readily be distinguished by its white upper tail coverts. 

 It ranges from the Arctic regions south to Central and South America and the 

 West Indies, being one of our common beach birds 'during the migrations. 

 It breeds in high latitudes. The eggs, which are usually four, are buff or 

 olive, spotted and dotted with dark brown, and measure about 1.27 x .94 

 (Ridgway). 



