18 Miscellaneous Circular 13, U. S. Dept. of Agriculture. 
147. Canvasback (Aristonetia valisineria’). (Fie. 14.) 
Range.—North America. Breeds from central British Columbia, Fort Yukon, Great Slave Lake, and 
southwestern Keewatin (N. W. T.) south to Oregon, northern Nevada, Colorado (rarely), Nebraska, and 
southern Minnesota; winters from southern British Columbia, Nevada, Colorado, Illinois, Pennsylvania, 
and western New York south to central Mexico (Jalisco) and the Gulfcoast; in winter formerly abundant, 
now less so, in Maryland, Virginia, and North Carolina; occasional south to Florida, and casual in the 
West Indies, Bermuda, and Guatemala ; in migration north rarely to New Brunswick and Nova Scotia. 
VERNACULAR NAMES. 
In general use.—Canvasback, often abbreviated to canvas, can, or canny. 
In local use.-—Bullneck (N. C.); canard cheval (horse duck), gray duck (La.); 
hickory-quaker (Md.); horse-duck (La.); red-headed bullmeck (N. C.); sheldrake 
(Va.); whiteback (Md., D. C., Va.). 
Geographic index.—D. C., whiteback; La., canard cheval, gray duck, horse-duck; 
Md., hickory-quaker, whiteback; N. C., bullneck, red-headed bullneck; Va., 
sheldrake, whiteback. ; 
FIG. 14.—Canvasback. 
BOOK NAMES. 
Canvas-backed duck, canvas duck, canard milouin aux yeux rouges (red-eyed 
pochard duck), milouin aux yeux rouges (red-eyed pochard), sea-duck. 
147.1 Tufted Duck (fuligula fuligula). 
Range.—Breeds in the northern parts of Europe and Asia; winters south to Africa, India, and western 
Polynesia; has been collected on the Pribilof Islands. 
Names.—Names used in Great Britain include black widgeon, black poker, and 
white-sided diver; and in France, canard morillon (vernacular name morillon of 
this duck probably traceable to the term ‘“‘more,’’ meaning moor or black). 
Scaup Ducks (Fuliz®). Nos. 148 and 149. 
The closely-related and very similarly colored scaup ducks share a number of 
names which it is desirable to treat in advance of the cognomens applied with more 
discrimination. It should be noted also that there isa tendency to include the ring- 
necked duck (No. 150) with the scaups under such collective names as blackhead, 
blackjack, and bluebill, but in general, names of that species are separable and all 
are so treated in this bulletin. 
7 Marila valisineria, 8 Marila. 
