AVES 417 



sixteen species of geese, and three species of swans native to 

 North America. 



PaludicolcB (living in swamps). This group includes marsh 

 birds which stalk about the shallow waters picking up the small 

 animals to be found there. They have long legs and corre- 

 spondingly long necks. The cranes, trumpeters, rails, coot, 

 tern, and gallinules are classed here. Their toes are not com- 



FIG. 217. 



FIG. 217. Ruffed Grouse (Bonasa umbellus). Photographed by J. W. Folsom. 



pletely webbed. They are light birds in proportion to the reach 

 of their neck, legs, and wings. 



LimicolcB (shore-residents) inhabit the margins of streams 

 and lakes and may wade in the shallows. These are similar 

 in many ways to the preceding group, but are smaller birds. 

 The group embraces the snipes, woodcock, sand-pipers, plover, 

 killdeer, avocets, and many others. They have slender legs 

 and long bills. They are alert birds with quick, active habits, 

 27 



