FAMILY ANATID.Z. — DUCKS, GEESE, AND SWANS. 
PAMILY, Ain ATED eA: 
DUCKS, GEESE, AND SWANS. 
SUBFAMILY MERGINA. MERGANSERS. 
FIsH-EATING Ducks HAVING NARROW BILLS WITH TOOTH-LIKE SERRATIONS ON 
EDGES ; TARSUS, SCUTELLATE IN FRONT (TRANSVERSE SCALES). 
GROUP 1. Wing, 6.50 to 8.50 inches long. See page 61. 
Group 2. Wing, 8.50 to 12 inches long. See page 63. 
SUBFAMILY ANATINZ. RIVER AND POND DUCKS. 
DucKs HAVING HIND TOE WITHOUT WELL DEVELOPED, MEMBRANEOUS LOBE OR 
FLAP; TARSUS, SCUTELLATE (TRANSVE RSE SCALES) IN FRONT. 
Group 1. Wing, 5 to 7.50 inches long. See page 63. 
Group 2. Wing, 8 to 10 inches long. See page 64. 
Section 1. Belly, white. See page 64. 
Section 2. Belly, not white. See page 64. 
Group 3. Wing, 10 to 14 inches long. See page 65. 
Section 1. Belly, white, or tinged with dusky or gray on lower part. 
Section 2. Belly, not white. See page 66. 
See page 65. 
SUBFAMILY FULIGULINZ/. BAY AND SEA DUCKS. 
DUCKS HAVING A FLAP OR MEMBRANEOUS LOBE ON HIND TOE; TARSUS, SCUTELLATE 
(TRANSVERSE SCALES) IN FRONT. 
Group 1. Wing, 5 to 6.50 inches long. See page 71. 
Section 1. Tail feathers, not stiff and pointed. See page 71. 
Section 2. Tail feathers, stiff and pointed. See page 71. 
Group 2. Wing, 6.50 to 7.50 inches long. See page 71. 
Section 1. Belly, white. See page 71. 
Section 2. Belly, not white. See page 72. 
Group 3. Wing, 7.50 to 8.50 inches long. See page 72. 
Section 1. Head, with more or less white or brownish white ; belly, white, sometimes 
tinged with dusky or gray on lower part. See page 72. 
Section 2. No white or grayish white on head; belly, white; sometimes tinged with 
grayish white on head. See page 73. 
Section 3. Belly, not white. See page 73. 
Group 4. Wing, 8.50 to 10 inches long. See page 74. 
Hind toe, with flap or lobe; belly, white, sometimes tinged on lower part 
Section 1. 
with dusky or gray; head, marked with more or less white, or brownish white. See 
page 74. 
