CANVAS-BACK. 
147. Marila valisineria. 21 inches. 
Differs from the Redhead in the shape of its black bill, its 
blackish forehead, very light colored back and red eyes, the 
Redhead having yellow eyes. Like the last species, these 
birds are excellent swimmers and divers, and secure their 
food from deeper water than many of the ducks. Their food 
consists of various fresh water plants and small fish; shell 
fish and frogs. These usually command the highest market 
price, and are much sought after by gunners. 
Nest.— On the ground in marshes or sloughs, lined with 
grass and feathers. 6 to 10 eggs of a pale olive (2.40 x 1.70). 
Range. —North America; breeding from central British 
Columbia south to Oregon and Minnesota. 
SCAUP DUCK OR BLUE-BILL. 
148. Marila marila. 18 inches. 
This and the following are widely known as Blue-bills owing 
to the slaty blue color of that member. Head, neck and breast 
are black; speculum and under-parts white, and eyes yellow. 
Nest. —In marshes about many of the ponds in the interior 
of British Columbia. 6 to 10 eggs pale greenish gray 
(2.50 x 1.70). 
4 
49 
