JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 31 



Bill, nearly straight and sharply pointed; inner side of middle toe 

 nail, with distinct comb-like edge; toes, four, all on same level. Bit- 

 terns, tail with ten feathers. Herons, tail with twelve feathers. 



Family ARDEID^. Herons, Egrets, and Bitterns. 



See page 78. 



Greater part of plumage, white; bill, very 

 large and stout, rounded and somewhat curved; 

 tarsus, always over five inches long; toes, four, all 

 on same level ; no comb-like edge on inner side of 

 middle toe nail; wing, over 16 inches long. 



Family CICONIID^. Storks and Wood Ibises. 

 See page 77. 



Bill, long, rather slender, and de- 

 cidedly curved downward; tarsus, 

 always less than five inches long; toes, 

 four, all on the same level ; no comb- 

 like edge on side'of middle toe nail. 



Family IBIDID^. Ibises. 



See page 76. 



