2 FAMILY ANATIDAE 



bird presses out with its bill, and uses to dress the feathers during the 

 operation known as "preening." (This gland is not peculiar to the 

 birds of this Family.) 



The species that are included in this work as more or less regular 

 visitors are: the Barnacle Goose, European Widgeon, European Teal, and 

 Masked Duck. 



The casual or accidental visitors to this continent, not included in 

 this work, are: 



(1) Whooper Swan, casual in Greenland; (2) Bean Goose, acciden- 

 tal in Greenland; (3) Pink-footed Goose, accidental in Massachusetts; 

 (4) White-faced Tree Duck, accidental in New Jersey; (5) Sheld-Duck, 

 accidental in Massachusetts; (6) Ruddy Sheldrake, accidental in New 

 Jersey and North Carolina; (7) Greenland Mallard, resident in Green- 

 land; (8) Bahama Pintail, casual in Florida and Wisconsin; (9) Fal- 

 cated Teal, casual in Pribilof Islands; (10) Baikal Teal, casual in Alaska; 

 (11) Pochard, casual in Pribilof Islands; (12) Tufted Duck, casual in 

 Pribilof Islands and Greenland; (13) Rufous-crested Duck, casual in 

 Long Island; (14) European Golden-eye, casual in Pribilof Islands; (15) 

 Velvet Scoter, accidental in Greenland. 



SWANS 



Subfamily Cygninae 



There are, distributed throughout the 

 world, nine forms of Swans, of which three, 

 including the Mute Swan, introduced from 

 Europe, are found regularly in North 

 America. 



The following features characterize this 

 Subfamily: 



(a) Very large size; the sexes, as in the 

 Geese, are alike in colour; the plumage of 



adults is usually 

 snowy white; the 

 necks are extreme- 

 ly long, even 

 longer than the 

 body, having 22 

 to 25 vertebrae 



FIG. I. Typical swan 



FIG. 2.- Foot and bill of 



swan showing reticulate 



tarsus 



(Geese have less than 20); the appearance is 

 stately, with graceful curving of the neck; the 

 habit is almost exclusively aquatic. 



(b) Space between the eye and the bill, 

 the lores, bare (covered with down in the 

 young); bill, high at base, broad and flat- 

 tened at the tip. 



