34 DIVERS—COLD-WEATHER DIVERS. 
about the time the ice is leaving and travels like the 
first issue, nesting in the interior around Hudson Bay 
and south of Great Slave Lake to Saskatchewan 
about its northern parallel. The third issue arrives 
after the ice has entirely gone, pairing about at 44°, 
and breeds from about 46° to 55°. 
The first fall issue is composed of birds hatched near 
the Canadian border, which collect upon the lakes and 
leave for the South during the month of August, 
slowly working their way to favorite feeding grounds. 
The second comes from above the line, taking to a 
great extent the others’ places. The third generally 
comes down with a rush, staying until driven south by 
ice and snow. They do not seem to like icy lakes in 
the fall so much as in the spring. 
Their favorite feeding grounds in the North of the 
United States are upon the lakes of North and South 
Dakota, Minnesota and Wisconsin; Iowa and Ne- 
braska in former years attracted them, but many feed- 
ings grounds there are nearly or entirely neglected. 
Upon the seaboard of the Atlantic, the Chesapeake 
Bay throughout its entire length, with the sounds and 
bays of the Carolinas, the coast of Florida and the Gulf 
of Mexico afford fine feeding grounds more or less 
every year; whilst the Pacific Coast is more variable 
and less productive of food. They feed in deep water 
as well as water of a moderate depth, owing to their 
diving propensities, like the redheads and scaups; 
wild celery, the bulbs of artichokes, potatoes and non- 
scented water lily, together with the lotus, are favorite 
foods 
Their playgrounds are in open sheets of water in 
