FAMILY ANATID.E. DUCKS, GEESK, AND SWANS. 59 



FA]\nLY ANATID7E. 



DUCKS, GEESE, AND SWANS. 

 SUBFAMILY MERGINvi:. MERGANSERS. 



FiSII-EATINC DrCKS HAVING NAKUOW lULI.S WITH TOOTH-LIKE SERRATIONS ON 

 KUGK.S; TARSUS, SCUTELLATE IN FRONT (TRANSVERSE SPALES). 



Group 1. Wing, fi.50 to 8.50 iuches long. .See page (U. 

 Groit 2. Wing. 8.50 to 12 inches long. See page (13. 



SUBFAMILY ANATIN^E. RIVER AND POND DUCKS. 



Ducks having hinp toe without well developed, membraneous lobe or 

 flap; tarsus, scutellate (transverse scales) in front. 



Groui' 1. Wing, 5 to 7.50 inclies long. See page G;{. 

 Group 2. Wing, 8 to 10 inches long. See page 04. 



Section 1 . Belly, Avhite. See page G4. 



Section 2. lielly, not white. See page 64. 

 Group 8. Wing, 10 to 14 inches long. See page 05. 



Section 1. Belly, white, or tinged with dusky or gray on lower part. See page l>5. 



Section 2. Belly, not white. See page 66. 



SUBFAMILY FULIGULIN^. BAY AND SEA DUCKS. 

 Ducks having a flai* or membraneous lobe on hind toe ; tarsus, scutellate 

 (transverse scales) in front. 



Group 1. Wing, 5 to 6.50 iuches long. See page 71. 



Section 1. Tail featliers, not stiff and i)ointed. See page 71. 

 Section 2. Tail feathers, stifl and pointed. See page 71. 

 Group 2. Wing, 6.50 to 7. .50 iuches 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 browuish white; helly, white, .sometimes 



tinged with dusky or gray on lower part. See page 72. 

 Section 2. No white or grayish white on liead ; helly, white; sometimes tiTiged with 



grayish white on head. See page 73. 

 Section S. Belly, not white. See page 73. 

 Group 4. NViug, S.,50 to iO iuches long. See page 74. 



Section 1. Hind toe, with flap or lobe; belly, white, sometime? tinged on lower part 

 with dusky or gray; head, marked with more or less u-hite, or brownish white. See 

 page 74. 



