FAMILY ANATID^E. DUCKS, GEESE, AND SWANS. 



63 



* Group 2. Wing, from 8.50 to 12 inches long. 

 Section 1. Bill, narrow, with tooth=like serrations. 



Distance from nostril to tip of bill, less than 1.50 ; head 

 and neck, greenish black ; underparts, creamy white, tinged 

 with salmou color; feet, red (male). 



Merganser americana. American Merganser. Sheldrake. 



See No. 86. 



Distance from nostril to tip of bill, less than 1 .50 ; head, 



rufous brown ; upper throat, white; feet, orange red (female). 



Merganser americana. American flerganser. Sheldrake. 



See No. 86. 



Top of bill. 

 Merganser americana. 



Distance from nostril to tip of bill, more than 1.50; head, 

 black, tinged with green; breast, rufous, streaked with black 

 (male). Merganser serrator. Red-breasted Herganser. 



See No. 87. 



Merganser serrator. 



Distance from nostril to tip of bill, more than 1.50 ; head, brownish, palest on the 

 throat; speculum, white (female). Merganser serrator. Red-breasted Herganser. 



See No. 87. 



SUBFAMILY ANATIN/E. 

 River and Pond Ducks. 



Ducks having hind toe without membraneous 

 lobe or flap ; tarsus, scutellate in front. 



*Group 1. Wing, 5 to 7.50 inches long. 

 Section 1. Hind toe, without flap or lobe. 



Large patch pale blue on wing (coverts) ; 

 white crescent on face (male) ; no white 

 crescent, face speckled; chin whitish (fe- 

 male) . Common in Eastern United States. 



Anas discors. Blue-winged Teal. 



Anasdiscors. See No. 97. 



Large patch of pale blue on wing (coverts) ; head and breast, rufous In-own ; crown, 



* For directions for measurement, see page 9, 



