SHORE BIRDS OF NORTH AMERICA. 



53 



GENUS CALIDRIS Cuv. 



CALIDRIS ARENARIA (Linn.). 

 Sanderling. Bull-peep. 



. 



Calidrta arcnarin. 



Adult in summer : Head, throat, and upper parts, except rump, reddish brown, black, and 

 white: throat and breast, pale rufous brown, with more or less dark spots; belly and under 

 parts, pure white; bill and feet, blaek; toes, three. 



Adult in winter: Top of the head and back, ash gray, the shafts of the feathers being 

 brown ; forehead and entire under parts, white ; bill, black. 



Length, 8.10; wing, 5.05; tarsus, 1; bill, 1. 



This cosmopolitan speciesamay always be distinguished by the absence 

 of the fourth toe, being the only sandpiper* occurring on our coast having 

 three toes. It is common during migrations, ranging from the Arctic 



IMovers also have three toes. 



