4i8 



ZOOLOGY 



pecies of geese, and three species of swans native to North 

 America north of Mexico. 



Paludicolaz {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, 

 and gallinules are classed here. Their toes are not completely 



Fig. 217. 



Ruffed Grouse (Bonasa urnbdlus umheHtis). Photographed by J. W. Folsom. 



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, 



