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



57 



* GROUP 2. Wing, from 8.50 to 12 inches long; bill, narrow, 

 with tooth-like serrations. 



Male. 



American Mergancer. 



Female. 



Distance from nostril to tip of bill, less 

 than 1.50; head and neck, greenish black ; 

 under parts, creamy white, tinged with sal- 

 mon color; feet, red (male). 



Mergus americanus. 

 American Merganser. Sheldrake. 

 See No. 37. 



Distance from nostril to tip of bill, less 

 than 1.50 ; head, rufous brown ; upper throat, 

 white; feet, orange red (female). 



Mergus americanus. 

 American Merganser. Sheldrake. 



See No. 37. 



Distance from nostril to tip of bill, more 

 than 1.50; head, black, tinged with green; 

 breast, rufous, streaked with black (male). 



Mergus serrator. 

 Red-breasted Merganser. 

 See No. 38. 



* For directions for measurement, see page 21. 



Top of bill. 

 Mergus americanus. 



Mergus serrator. 



