PHYSICAL FEATURES OF BIRDS. 



265 



which makes it possible for the bird to walk over the water 

 surfaces in its native haunts by stepping on the broad 

 leaves of the water plants. Our own shore and swamp 



'Second Joint " 



Tibia 



-Legproper 

 "Drumstick" 



Knee 



Heel 



Foot, or me tatans 

 "Tarsus " 



FIG. 105. Hind limb, or leg and foot, of a bird. (After Coues.) 



