JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 83 



General plumage, white; legs, dark olive; terminal half of bill, 

 black ; basal half, flesh color (white phase ) . 



Dichromanassa rufescens. 

 Reddish Egret. 

 See No. 85. 



Head and neck, rufous chestnut; rest of plumage, slate color, or 



slaty gray. Dichromanassa rufescens. 



Reddish Egret. 

 See No. 85. 



General plumage, yellow brown, mottled and streaked with dark 

 brown; upper surface of primaries, blackish. 



Botaurus lentiginosus . 

 American Bittern. 

 See No. 79. 



* GROUP 5. Wing, over 15 inches long. 



Plumage, entirely white; wing, less than 17 inches long; bill, 

 under 5.50; tarsus, under 7.25. Herodias egretta. 



American Egret. 

 See No. 83. 



Greater part of upper plumage, bluish gray or slaty gray; adults 

 in breeding have middle of crown and throat, white; bill, less than 

 6.25; immature birds have the top of the head, black. 



Ardea herodias. 

 Great Blue Heron. 

 See No. 82. 



* For directions for measurement, see page 21. 



