MERGANSERS 187 
Most of these birds breed north of the United States; in eastern 
North America, only five of our forty species nesting south of latitude 
41°. We know them, therefore, as migrants and as winter visitants 
and to those who are so fortunate as to live near their haunts, their 
goings and comings are among the most important events in the birds’ 
calendar. Strong of wing, hardy of body, many species pass the winter 
on the open sea, while the river and bay Ducks remain until ice forms, 
and return the first day of open water. How the eye is held by the 
sight of their swiftly moving forms silhouetted against thesky! Through 
them, bird-life makes its strongest appeal to our love of the wild and 
elemental in nature. 
As the ancestors of our domesticated water-fowl and as game, the 
Anatide are doubtless better known to man than any other birds. Of 
late years their numbers have been greatly reduced by excessive shoot- 
ing for market and for sport, and by the reclamation for the agriculturist 
of vast areas in which formerly they bred. We have, consequently, 
only to examine the history of the past few decades to be assured that 
a further attempt to supply the unlimited and ever-growing demands 
of the game-dealer for wild-fowl means, ultimately, that both market 
hunters and sportsmen may lay aside their guns. Let us, therefore, 
look to our poultry yards for Ducks and Geese as food, and leave the 
wild birds as a lure to draw brain-weary toilers to marsh, bay and 
headland. : 
1896. J os, H. K., Ducks of Plymouth Co., Mass., Auk, XIII, 197-204.— 
1897. Cory, C. B., How to Know the Ducks, Geese and Swans, 8vo. pp. 
94, many ills—1898. Exuior, D. G., Wild-Fowl of United States and 
British Possessions, 8vo, pp. 316, plls. 63 (Francis Harper),—1901-2. 
Bent, A. C., Nesting Habits of Anatide in N. D., Auk, XVIII, 328-336; 
XIX, I-12; 165-174.—1902. Jos, H. K., Among the Water-¥owl (Double- 
day).—1903. Huntineton, D. W., Our Feathered Game, 8vo, pp. 396, 
plls. 37.—1903. Sanrorp, L. C., BisHop, L. B., Van Dyxz, T. §., The 
‘Water-Fowl Family, 12mo. pp. ix—598, plls. 20 (Macmillan).—1906. Cooxs, 
W. W., Dist. and Migr. of N. A. Ducks, Geese, and Swans, Bull. 26, Biol. 
Surv.—1907. Ricu, W. H., Feathered Game of the Northeast, 8vo. pp. 
432, pls. 87.—1909. DeHaven, I. N., Duck Shooting on _N. J. Coast, 
Cassinia, 11-18.— 1910. Grinneuy, G. B., American Game Bird Shooting, 
8vo, pp. xvili-558 (Forest and Stream).—1910. Huntineron, D. W., 
Our Wild Fowl and Waders, pp. 207 (New York City).—1911. Puruuies, 
J. C., Ten Years’ Migration of Anatide at Wenham, Mass., Auk, XXVIII, 
188-200; see also, 319-323. 
Subfamily Mergine. Mergansers. (Fig. 33.) 
The five subfamilies into which our Anatide fall are so well defined, 
it seems advisable to treat of each one separately. The first of these, 
the Shelldrakes or Sawbills, are fish-eating Ducks. They pursue and 
capture their prey under water, progressing by aid of the feet alone, 
and their serrate bills seem especially adapted to this mode of feeding. 
Three of the nine known species are found in North America, and all 
may be recognized in life by their cylindrical bill. 
