9U 



KKY TO THE BIKDS OF EASTERN NORTH AMERICA. 



* Qroup 2. Wing, 6 to 7.50 inches long. 



Oowa, ffreeuish or ucreciiish l)luc-k; Icgd, uiuuge yellow iu life. 



Ardeu virescens. Qreen Heron, 



See No. ir)S. 



* Group 3. Wing, 8.50 to 1 1 inches long. 



Greater iKirt of jjluiniige, slaty blue; belly, slaty blue; head, tino^cd witli imrplisli brown 

 (adult). ' Ardcd cwrulfo. Little Blue Heron. 



See No. 157. 



* For ilirections for measnrfinent, pee i);ige p. 



