16 COLD AND WARM WEATHER BIRDS. 
nesting grounds commence from 40° parallel and in- 
crease as they approach the Canadian line, whence 
they spread to 75°. 
The pintails are the only cold-weather birds breed- 
ing south of 41°, of the non-diver family. Their diet 
consists of various foods; see chart. Their clutch is 
ten to twelve greenish blue or whitish eggs. It is a 
prairie bird in the west and north, only frequenting 
the wooded lakes south, where a food supply exists, 
but not going into the timber beyond its edges. 
Length 29; wing 11; tarsus 1.75; extent 36.00; middle 
toe 2.00. 
SuBGENUS Wefstium. 
Anas Carolinensis—GREEN-WINGED TEAL.—Habitat. 
—Throughout the American continent to British 
America, Alaska and beyond. The greenwinged teal 
has three principal flights, the Atlantic, the Pacific, and 
the Mississippi River; the latter branches off west, up 
the Missouri River, and from the Fox Lake Chain oi 
Lakes northward and eastward to Hudson’s Bay, 
through the [Illinois and Ohio rivers. 
The spring migration of this the smallest of our 
non-divers closely follows the mallard and_ pintail, 
frequently being associated with them during its flight, 
especially the mallard. The first issue arrives a day 
or two alter the pintails and follows up the rivers, 
lakes and sloughs, usually preferring the edges oi 
muddy banks. This issue stays only a short time and 
departs before the second arrives, usually about four 
or five days intervening; the second issue spreads over 
the country and is often joined by the third, staying 
for several weeks before they travel northward. At 
