Shore Birds. 
237. Pribilof Sandpiper (Arquatella ptilocnemts). 
L. 10. Ads. Similar to No. 236 above but crowu 
much lighter; breast with a black patch. Yung.  Re- 
semble adult above but breast grayish indistinctly 
streaked and with a pale buff band; belly white. 
Winter. Similar to yng. but slaty gray above. 
Range.—‘‘Breeding in the Pribilof Islands, Alaska, and migrat- 
Ing to coast of adjacent mainland south of Norton Sound.” (A.O.U.) 
“ 243a, Red-backed Sandpiper (‘Pelidna alpina pa- 
cifica). L. 8; B. 1.5; slightly curved. ds. Belly 
black; back chiefly rusty. Yxg. Breast buffy, light- 
ly streaked with dusky; belly white spotted with black; 
back black, rusty, and buff. Winter. Above brown- 
ish gray; below white; breast grayish, indistinctly 
streaked. 
Range.—North America; breeds in Arctic regions and winters from 
Gulf States and California to South America. 
X 246. Semipalmated Sandpiper (Ereunetes pusillus). 
L. 6.3; B. .6 to .8. Toes webbed at base. Ads. 
Above brownish gray and black; Jittle or no 
rusty; below white, breast imdistinctly streaked. Yng. 
Above with rusty and whitish margins; below white, 
breast grayish no streaks. Wenter. Above brownish 
gray with black shaft streaks; below white. Notes. 
weet-weet. 
Range.—Eastern North America; breeds In Arctic regions; winters 
from Gulf States to South America. 
247. Western Sandpiper (Ereunetes occidentalis). 
Similar to preceding but bill longer .8 to 1.2; ads. more 
rusty above, breast streaks more distinct. and more 
numerous. Notes. Call, asoft weet-weet; song, uttered on 
the wing, ‘‘arapid, uniform series of rather musical 
trills.”’ (Nelson. 
Range,—North America, chiefly west of Mississippi Valley; breeds 
In Arctic regions; winters from Gulf States to South America. 
“248. Sanderling (Calidris arenaria). L.8. Three 
toes, tarsus scaled. Ads. Above rusty, black and 
grayish; below white, breast spotted with black and 
washed with rusty. Yng. Nape grayish, back black 
feathers with two white or yellowish white terminal 
spots; below silky white. Winter. Above brownish 
gray with dusky shaft streaks; below silky white. 
Range.—‘Nearly cosmopolitan, breeding In Arctic and Sub- 
rape itu! migrating, In America, south to Chili and Patagonia.”” 
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