13 



Back black and white ; wing coverts not blue, 



Green-winged Teal. 



Back varied with brown and black ; wing coverts,. 



sky-blue. Blue-winged Teal. 



2. Birds of Open Field, Marsh or Shore, with long, bare 

 legs. 



A. More or less pure white beneath, with or without 

 spots. 



a. Upper parts more or less variegated and streaked 

 with black, brown and lighter shades, 

 b. Length over 10 inches. 



Bill 2| in. ; crown black with pale median stripe ;. 



legs greenish-gray, Wilson's Snipe. 



Bill 1^ in. ; crown not as above ; legs chrome 



yellow. Yellow-legs. 



Bill 1 in. ; crown variegated ; legs not bright 



yellow. Upland Plover. 



bb. Length under 9 inches. 



Length over 8 in. ; under parts slightly streaked,. 



not clearly spotted , Solitary Sandpiper. 



Length under 8 in. ; under parts distinctly spotted, 



Spotted Sandpiper. 

 Length under 6 in. ; under parts streaked and. 

 spotted, Least Sandpiper. 



aa. Upper parts uniform ashy or grayish-brown, not 

 streaked ; a white collar around neck, often accom- 

 panied by a black one. 

 Length over 9 in. ; upper tail coverts tawny, Kildeer. 

 Length under 7 in. ; upper tail coverts white, 



Piping Plover. 



B. Not white beneath. 



a. Length 1 to 1| feet ; bill long, 2 inches or more ;. 

 legs long and bare. 



