CALIFORNIA MURRE. 
30. Uria troille californica. 15 to 16 inches. 
This is one of the most abundant birds breeding on the Far- 
allones. Large numbers of their eggs are taken yearly to the 
San Francisco and other market places and disposed of as a 
food product, and as yet the birds do not seem to diminish to 
any great extent. 
Nest.- —But a single white egg is laid on the bare ledges. 
They vary greatly in color, from nearly white without mark¬ 
ings to a deep greenish blue with an endless variety of patterns 
in light and dark brown (3.40 x 2.00). 
Range. —Pacific coast, breeding from the Farallones north to 
Alaska. 
POMARINE JAEGER. 
36. Stercorarius pomarinus. 21 inches. 
These birds are slender and graceful in form and flight, but 
are the real pirates of bird life, especially among the terns 
and gulls. This species has two color phases regardless of 
sex or age. In the light plumage the top of the head is black, 
rest of the bird brownish. Easily identified by the lengthened 
central tail-feathers. 
Nest. —Two olive brown eggs spotted with black (2.20 x 1.70). 
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