106 Lirds of Canada. 
rivers, and threatening destruction to all the finny 
tribe. The Common Cormorant is thirty-seven 
inches in length; the color, bluish-black, gular- 
sac, yellow, with a broad white band at the base. 
DOUBLE-CRESTED CORMORANT. 
Graculus dilophus—The Double-crested 
Cormorant. 
This species is not so well known as the pre- 
ceding. Its habits are similar to the Common 
Cormorant. Breeds in Labrador. The head, 
neck, lower part of the back, and entire under 
surface, is greenish-black ; upper mandible, dark 
brown ; lower, yellow ; iris, green ; legs, and feet, 
black ; gular sac, orange; behind each eye isa 
tuft of loose feathers, which form the crest. 
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