FAMILY ANATIDA:. — DUCKS, GEESE, AND SWANS. 63 
*Group 2. Wing, from 8.50 to 12 inches long. 
Section 1. Bill, narrow, with tooth-=like serrations. 
Z Distance from nostril to tip of bill, less than 1.50; head 
2 and neck, greenish black; underparts, creamy white, tinged 
aa with salmon 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 Tlerganser, 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 Merganser. 
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 Tlerganser. 
See No. 87. 
SUBFAMILY ANATINA. 
River and Pond Ducks. 
Ducks having hind toe without membraneous 
lobe or flap; tarsus, scutellate in front. 
B'S 
* Group |. Wing, 5 to 7.50 inches long. 
Section 1. Hind toe, without flap or lobe. 
Large patch pale blue on wing (coyerts) : 
white crescent on face (male); no white 
crescent, face speckled; chin whitish (fe- 
male). Common in Eastern United States. 
Anas discors. Blue=winged Teal. 
Anas discors. See No. 97. 
Large patch of pale blue on wing (coverts); head and breast, rufous brown; crown, 
* For directions for measurement, see page 9. 
